Rita is mailing packages. Each small package costs her $2.80 to send. Each large package costs her

[math_celebrity]

Rita is mailing packages. Each small package costs her $2.80 to send. Each large package costs her $3.40 . How much will it cost her to send 7 small packages and 5 large packages?

Total Cost = Small Package Cost * small packages + Large Package Cost * large packages
Total Cost = 2.80 * 7 + 3.40 * 5
Total Cost = 19.6 + 17
Total Cost = $36.60