Answer:
A. 500 + n 3 < 1300
B. 266
Step-by-step explanation:
500 dollars por labor and running and 3 more dolars every book the make should be less than 1300$
500 + n 3 < 1300
n 3 < 1300 - 500
n < 800 / 3
n < 266,667
As books are units and should be natural numbers, then the gratest number of books is 266.