The plaintiff alleges that he became production manager of the defendant corporation pursuant to terms of the contract referred to herein, and that his services resulted in corporate savings “of more than $7,000.00 in the manufacture of wagons and other articles.” For the purpose of testing the sufficiency of the allegations in a complaint, a demurrer ore ienus admits the facts to be as alleged. Eaton v. Doub, 190 N. C., 14, 128 S. E., 494; Pearce v. Privette, 213 N. C., 501, 196 S. E., 843; Packard v. Smart, 224 N. C., 480, 31 S. E. (2d), 517, 155 A. L. R., 536; Morgan v. Carolina Coach Co., 225 N. C., 668, 36 S. E. (2d), 263.
Consequently, we must determine whether or not there was error in sustaining the demurrer ore ienus. The ruling of the court below was proper if the provision for the payment of the stipulated bonus is too indefinite, vague and uncertain to be enforced, otherwise not.
*183A bonus offered by an employer to an employee as an inducement to tbe employee to render more efficient service over a stipulated period of time, is not a gratuity or gift; and, when tbe employee accepts tbe offer and enters tbe service of tbe employer, “it becomes a supplementary contract of wbicb be cannot be derprived without sufficient cause.” Roberts v. Mills, 184 N. C., 406, 114 S. E., 530, 28 A. L. R., 338; Warren v. Mosher, 31 Ariz., 33, 250 Pac., 354, 49 A. L. R., 1311.
Tbe appellees are relying upon tbe vagueness of tbe contract, because it did not spell out bow tbe savings “of more tban $7,000.00 in tbe manufacture of wagons and other articles” was to be ascertained, citing Van Slyke v. Broadway Ins. Co., 115 Cal., 644, 47 Pac., 689; Petze v. Morse Dry Dock & Repair Co., 125 App. Div., 267, 109 N. Y. Supp., 328; Varney v. Ditmars, 217 N. Y., 223, 111 N. E., 822; Ann. Gas. 1916 B, 758, and similar cases.
In Van Slyke v. Broadway Ins. Co., supra, a contract between an insurance agent and tbe insurance company for a contingent commission of five per cent, wbicb did not give tbe facts upon wbicb tbe contingency depended nor state tbe sum on wbicb tbe five per cent was to be computed, was held unenforceable.
Likewise, in Petze v. Morse Dry Dock & Repair Co., supra, tbe Court held that a contract by wbicb an employee, in addition to certain specified compensation was to receive five per cent of tbe net distributable profits of a business, was unenforceable because tbe parties also agreed that tbe method of accounting to determine tbe net distributable profits should be agreed upon later; and, tbe defendant would not agree upon a method of accounting to determine such net distributable profits.
In tbe case of Varney v. Ditmars, supra, tbe contract called for tbe employee to receive “a fair share of tbe profits.” This provision was held to be too “vague, indefinite, and uncertain” to be enforced.
Tbe appellant, on tbe other band, contends that there is nothing vague, uncertain or indefinite in tbe contract. Tbe time of performance was fixed. Tbe nature of tbe work to be done under tbe provisions of tbe agreement is sufficiently clear. Tbe services have been rendered. Tbe only question wbicb remains to be determined is whether or not such services actually resulted in a savings of more tban $7,000.00, as alleged in tbe complaint. If so, be is entitled to recover, otherwise not.
A contract of employment at a fixed salary, with tbe promise of a further sum or “bonus,” either measured by tbe earnings of tbe business or as a fixed sum, is enforceable. Williston on Contracts, Revised Ed., Vol. I, Sec. 130 B, citing Roberts v. Mills, supra; Kennicott v. Wayne, 83 U. S., 452, 21 L. Ed., 319, and other authorities.
In tbe case of Fruth v. Gaston (Texas Civil Appeals), 187 S. W. (2d), 581, Frutb was to receive a salary of $42.50 per week and in addition *184thereto 1% on gross sales and “between 3% and 5% of the net profits, to be later agreed upon.” The Court held although the percentage of net profits to be received by the plaintiff was not definitely agreed upon, but left for future determination, the plaintiff’s right of recovery was not defeated. “Such a promise would imply an agreement to pay at least the minimum amount designated.”
In the case of Sutliff v. Seidenberg, 132 Cal., 63, 64 Pac., 131, it was held: “A contract may be explained by reference to the circumstance under which it was made and the matter to which it relates. . . . Read in the light of these rules, the contract seems to us quite intelligible and certain. Defendants were doing business as cigar manufacturers in New York City, and desired to make a market for their goods in California. Adelsdorfer & Brandenstein, who were merchants in San Francisco, were made their distributing agents, and Simon was to assist them in introducing the goods to the public. Defendants not only spoke in the contract of making their line of cigars a success, but they further explained their meaning in the clause, ‘and for all services necessary to represent our interest we agree to pay,’ etc., and by the clause, ‘this agreement to remain in force as long as our goods find ready sale on this coast.’ 'Whatever of uncertainty there may be in the meaning of the clause ‘to make our line of cigars a success in San Francisco’ seems to be cleared up, at least sufficiently as against a general demurrer, by the subsequent clauses.”
It seems to us the only difficulty here, if there be any, is to determine how the parties contemplated ascertaining the savings of more than $7,000.00 in the manufacture of wagons and other articles, which was made a condition precedent to the right of plaintiff to recover the bonus of $2,000.00.
Evidently the plaintiff held himself out as an expert production manager, at least the president of the defendant corporation who employed him thought him to be so. Doubtless the management of the corporation was not satisfied with production costs. It is a matter of common knowledge that oftentimes the ability of the management of a corporation' to reduce its manufacturing costs to a minimum without impairing efficiency in production, spells the difference between success and failure. Savings in the process of manufacturing a product may be effected in many different ways. Sometimes' it is brought about by the increased efficiency of labor or by the elimination of antiquated methods in the manufacturing process. There is certainly nothing in the contract under consideration that would justify an interpretation that the parties had in mind any savings in the purchase of raw materials, the sale of the manufactured products of the corporation or by the curtailment of operations. The very terms of the contract exclude such an interpretation. *185But we do think the minds of the parties met on what was to be done and where the production manager was to effect the savings and how much the savings had to be before he would be entitled to receive the additional $2,000.00. The savings were to be effected by a reduction in production costs.
It is permissible to consider the nature of the work to be done, the circumstances surrounding the making of such a contract, and the usual custom of arriving at production costs, in the interpretation of this and similar contracts. What did the parties contemplate when they contracted with reference to a saving of more than $7,000.00 in the manufacture of wagons and other articles? The only legitimate answer to that question, if the parties were acting in good faith, and we presume they were, is that if by efficient management a sum in excess of $7,000.00 could be saved in production costs in the manufacture of wagons and other articles manufactured by the corporation in the year 1945, as compared to production costs the previous year in the manufacture of such articles, the plaintiff would be entitled to the additional compensation, otherwise not. Id cerium est quod certum reddi potest. The law does not favor the destruction of contracts on account of uncertainty, and “the Courts will, if possible, so construe the contract as to carry into effect the reasonable intent of the parties, if it can be ascertained.” Fisher v. Lumber Co., 183 N. C., 485, 111 S. E., 857, 35 A. L. R., 1417, 12 Am. Jur., 556; McCaw Mfg. Co. v. Felder, 115 Ga., 408, 41 So., 664; Southwest Pipe Line Co. v. Empire Natural Gas Co., 33 F. (2), 248; 64 A. L. R., 1229.
In the case of McCaw Mfg. Co. v. Felder, supra, a corporation engaged in the manufacture of boxes, agreed to furnish the defendant “all the boxes which should be rendered necessary to-pack the output of the factory of the defendant, and corresponding promise on the part of the defendant to order from the company all such boxes,” was held to be an enforceable contract against either party. The Court said: “The promise of the one' was a sufficient consideration for the promise of' the other. It would have been, perhaps, impossible for the defendant to have specified the exact number of boxes which it would require for the period of one year, but it was doubtless well understood by both parties to the agreement what the approximate number would be, based on the number of boxes the defendant had required during a similar period in the past; and the fact that the exact number of boxes was not specified would not render the contract void for want of mutuality.”
We have no doubt but that most well managed corporations keep accurate records on manufacturing costs from year to year. While we are not concerned as to whether or not the plaintiff can make out his case *186before tbe jury, we do think the allegations of the complaint are sufficient to survive the demurrer.
The judgment of the court below is
Reversed.