Using only 1$,5$,10$ and 20$ bills, the number of ways that change can be made for a 50$ bill is?
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20, 20, 10 20, 20, 5, 5 20, 10, 10, 10 20, 10, 10, 5, 5 20, 10, 5, 5, 5, 5 20, 5, 5, 5, 5, 5, 5, 10, 10, 10, 10, 10 10, 10, 10, 10, 5, 5 10, 10, 10, 5, 5, 5, 5 10, 10, 5, 5, 5, 5, 5, 5 10, 5, 5, 5, 5, 5, 5, 5, 5 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 (So I believe 12 ways.)
+234 
