Kira is a software saleswoman. Her base salary is $1600 , and she makes an additional $80 for every copy of History is Fun she sells. Let P represent her total pay (in dollars), and let N represent the number of copies of History is Fun she sells. Write an equation relating P to N .
Then use this equation to find her total pay if she sells 28 copies of History is Fun.

Equation:

Total pay if Kira sells 28 copies: $