The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 12 g | 30i¢ |
Every additional 6 g or less | 12i¢ | |
Postcards | Per piece | 90¢ |
Rael sent 3 postcards and a letter. The letter weighed 17 g. How much did Rael pay in total? Give your answer in terms of i in the simplest form.