// You start at $0.01, which is correct:
double Payment = .01;
// Then in your loop:
cout << Min_Number << "\t\t\t$" << (Payment *= 2) << endl; // <- you double it before you print it
Total += Payment; // <- and before you add it to the total.
// So ultimately the first number you are printing/summing is $0.02
Ahhh! It never occurred to me that I could put the multiplication at the end as it's own line! Order is paramount! I fixed it though. This is how that portion ended up looking: