Al sees this sign at a copy center. What is the least number of copies. Al can make without losing any money

The sign states:

1) Copies cost 10 cents each

2) Copy machines only take quarters

3) Copy machines do not make change. If you make 1 copy, you don't get 15 cents back.

The least number of copies Al can make without losing money is 5.

5 x 10 cents = 50 cents

50 / 0.25 = 2

Al can insert two quarters in the copy machine and have 5 copies. He can have an interval of 5 copies to get his money's worth.