export declare function isValidSpecValue(value: string): boolean | undefined;
export declare const validateSpecValue: (value: string) => string;
export declare function getPriceString(price: string): string;
export declare function numberWithCommas(num: number): string;
export declare function getDiscountPercentage({ fixedPrice, goodsPrice, }: {
    fixedPrice: number;
    goodsPrice: number;
}): number;