The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 10 g | 28r¢ |
Every additional 5 g or less | 8r¢ | |
Postcards | Per piece | 70¢ |
George sent 5 postcards and a letter. The letter weighed 23 g. How much did George pay in total? Give your answer in terms of r in the simplest form.