The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 12 g | 23y¢ |
Every additional 6 g or less | 12y¢ | |
Postcards | Per piece | 60¢ |
Jack sent 3 postcards and a letter. The letter weighed 21 g. How much did Jack pay in total? Give your answer in terms of y in the simplest form.