The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 8 g | 28b¢ |
Every additional 4 g or less | 10b¢ | |
Postcards | Per piece | 50¢ |
Michael sent 2 postcards and a letter. The letter weighed 19 g. How much did Michael pay in total? Give your answer in terms of b in the simplest form.