Nitin Is Paid a Base Salary of $300 Per Week

Multiple Choice

Nitin is paid a base salary of $300 per week and commission at the rate of 2.5% for sales over $5,000, 4% if his sales are over $10,000, and 4.5% if sales are over $25,000. How much will Nitin earn in a week in which his sales are $20,000?

A) $800
B) $1,100
C) $900
D) $1,200
E) $1,125