using System;

​

public class Program

{

    public static void Main()

    {

        var points = 60700m;

        Console.WriteLine($"Points: {points}");

​

        var amount = 60790m;

        Console.WriteLine($"Amount: {amount}");

​

        var maximumSpend = 50000m;

        Console.WriteLine($"MaximumSpend: {maximumSpend}");

​

        var pointsMultiplier = 2m;

        Console.WriteLine($"Points Multiplier: {pointsMultiplier}");

​

        var maxPointsPerCustomer = 100000m;

        Console.WriteLine($"MaximumSpend: {maxPointsPerCustomer}");

​

​

        var pointsPerAmount = points / amount;

        Console.WriteLine($"Points/Amount: {pointsPerAmount}");

​

        var spendAmount = Math.Min(amount, maximumSpend);

        Console.WriteLine($"Spend Amount: {spendAmount}");

​

        var pointsEarned = Math.Min(pointsPerAmount * spendAmount * pointsMultiplier,

            maxPointsPerCustomer);

        Console.WriteLine($"Points Earned: {pointsEarned}");

​

        var decimals = 0;

        var result = Floor(pointsEarned, decimals);

​

        Console.WriteLine($"Result: {result}");

    }

​

    private static decimal Floor(decimal value, int decimals)

    {

        if (decimals == 0)

            return Math.Floor(value);

        var factor = (decimal)Math.Pow(10, -decimals);

        return Floor(value / factor, 0) * factor;

    }

}