Lamar is a software salesman. His base salary is 1700$ , and he makes an additional 70$ for every copy of History is Fun he sells. Let p represent his total pay (in dollars), and let n represent the number of copies of History is Fun he sells. Write an equation relating to p to n . Then use this equation to find his total pay if he sells 28 copies of History is Fun.

(n)=70n+1700 
so that 
P(28)=70(28)+1700=3660 
so he earns $3660.00