Janice bought 30 items each priced at 30 cents, 2 dollars, or 3 dollars. If her total purchase price was $30.00, how many 30-cent items did she purchase?
Using some logic
20 - 30 cent items = $6
6 - 2 dollar items = $12
4 - 3 dollar items = $12
__ ____
30 items $30
+501 
