The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 16 g | 21s¢ |
Every additional 8 g or less | 7s¢ | |
Postcards | Per piece | 60¢ |
Daniel sent 4 postcards and a letter. The letter weighed 19 g. How much did Daniel pay in total? Give your answer in terms of s in the simplest form.