The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 20 g | 24a¢ |
Every additional 10 g or less | 6a¢ | |
Postcards | Per piece | 90¢ |
Jack sent 4 postcards and a letter. The letter weighed 35 g. How much did Jack pay in total? Give your answer in terms of a in the simplest form.