The airmail rates to a country are shown.
Type | Mass | Cost |
Letters |
First 20 g | 25y¢ |
Every additional 10 g or less | 5y¢ | |
Postcards | Per piece | 80¢ |
Simon sent 4 postcards and a letter. The letter weighed 25 g. How much did Simon pay in total? Give your answer in terms of y in the simplest form.