The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 8 g | 25z¢ |
Every additional 4 g or less | 11z¢ | |
Postcards | Per piece | 70¢ |
Luke sent 4 postcards and a letter. The letter weighed 15 g. How much did Luke pay in total? Give your answer in terms of z in the simplest form.