An Author Who Writes Newspaper Columns for $75 Each Is

An author who writes newspaper columns for $75 each is deciding whether to purchase a personal computer with a laser printer.She figures she'd be able to write two more columns per month than she could on her typewriter.She should

A) buy the computer if the monthly payment is less than $300
B) buy the computer regardless of its price
C) not buy the computer if the monthly payment is greater than $75
D) not buy the computer regardless of the price
E) buy the computer if the monthly payment is less than $150