The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 20 g | 21d¢ |
Every additional 10 g or less | 6d¢ | |
Postcards | Per piece | 80¢ |
Ivan sent 5 postcards and a letter. The letter weighed 45 g. How much did Ivan pay in total? Give your answer in terms of d in the simplest form.