In a Mobile Phone shop, a salesman earns a fixed salary of 4,500 Dhs per month and a commission of 15 Dhs for every phone he sells.

His gross salary can be calculated using the following formula:

GS=15x +4,500

where GS is his Gross Salary and x is the number of phones he sells.



What is his gross salary for the Month of December if he sells 65 phones during the month?