The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 12 g | 27w¢ |
Every additional 6 g or less | 12w¢ | |
Postcards | Per piece | 50¢ |
Harry sent 3 postcards and a letter. The letter weighed 27 g. How much did Harry pay in total? Give your answer in terms of w in the simplest form.