/** O&M multiplier by scheme display year (om_year), keys 1–10 (matches scheme_yearly_details.year_number). */
export declare const MULTIPLIER_BY_YEAR: Readonly<Record<number, number>>;
/** `year` is the 1-based display year (1..10). Returns null for any other input. */
export declare function multiplierForSchemeYear(year: number): number | null;
export declare function round2(n: number): number;
export declare function parseFiniteDecimal(v: unknown): number | null;
export type OmFinancials = {
    multiplier: number;
    omAmount: number;
    monthlyAmount: number;
};
/** om_amount = cost * multiplier; monthly_amount = om_amount / 12 (2 dp). `schemeYear` is 1..10. */
export declare function computeOmFinancials(finalExecutedWorkCost: number, schemeYear: number): OmFinancials | null;
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