The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 10 g | 21s¢ |
Every additional 5 g or less | 8s¢ | |
Postcards | Per piece | 50¢ |
Luke sent 5 postcards and a letter. The letter weighed 22 g. How much did Luke pay in total? Give your answer in terms of s in the simplest form.