Interface ValidityPeriodWithAdditionalCost

interface ValidityPeriodWithAdditionalCost {
    additionalCosts: {
        singleSupplement?: PricingCalculator.Cost;
        [key: string]: undefined | PricingCalculator.Cost;
    };
    blackoutStartDate: {
        daysOfTheWeek: (0 | 1 | 2 | 3 | 4 | 5 | 6)[];
        isBlackout: boolean;
    };
    costThresholds: PricingCalculator.CostThreshold[];
    endDate: Date;
    startDate: Date;
}