Answer:
2 part answer - see below (final answer is $5260
Step-by-step explanation:
N(120) will represent copies of books sold
P is for her paycheck (money from the books sold and her salary)!
SO:
equation - 1900 + N(120) = P
If we put 28 into N...
1900 + 28 (120) = P
1900 + 3360 = $5260