The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 8 g | 23d¢ |
Every additional 4 g or less | 10d¢ | |
Postcards | Per piece | 40¢ |
Owen sent 2 postcards and a letter. The letter weighed 18 g. How much did Owen pay in total? Give your answer in terms of d in the simplest form.