const decimal executionCountCost = 0.20m / 1000000m;
const decimal gbSecCost = 0.000016m;
const decimal executionUnitsToGbSecConversion = 1m / (1024 * 1000);

long executionCountPerHour = 6500012;
long executionUnitsPerHour = 90305037184;
int runDurationDays = 9;

Console.WriteLine("All prices in USD");

decimal gbSecPerHour = executionUnitsPerHour * executionUnitsToGbSecConversion;
Console.WriteLine("GB-seconds per hour: " + Math.Round(gbSecPerHour, 0));

decimal costPerHour = (executionCountPerHour * executionCountCost) + (gbSecPerHour * gbSecCost);
Console.WriteLine("Cost per hour: $" + Math.Round(costPerHour,2));

decimal costPerDay = costPerHour * 24;
Console.WriteLine("Cost per day: $" + Math.Round(costPerDay, 2));

decimal totalCost = costPerDay * runDurationDays;
Console.WriteLine("Total run cost: $" + Math.Round(totalCost, 2));