Susan buys the items listed below at a grocery store.
2 packages of chicken priced at $12.36 per package
1 half-pound of broccoli priced at $1.98 per pound
1 gallon of milk priced at $3.49 per gallon
There is no sales tax on the food she buys. Susan pays for the item and receives $0.80 in change. What amount of money does Susan use to pay for the items?