The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 12 g | 27w¢ |
Every additional 6 g or less | 10w¢ | |
Postcards | Per piece | 60¢ |
Jenson sent 3 postcards and a letter. The letter weighed 15 g. How much did Jenson pay in total? Give your answer in terms of w in the simplest form.