export declare const mortgageMultiplier: (r: number, n: number) => number;
export declare const mortgageRepayment: (p: number, r: number, n: number) => number;
export declare const dueAtN: (p: number, c: number, r: number, n: number) => number;
export declare const interestAtN: (p: number, c: number, r: number, n: number) => number;
export declare const cumulativeInterestAtN: (p: number, c: number, r: number, n: number) => number;