Assume you are trying to budget your costs for the month, and want to figure out whether you should move to a new apartment. Your rent is currently $900/month, your groceries amount to $200/month, and your other costs amount to $100/month. What is your differential cost if another apartment is charging $750/month in rent? Select one: a. $200.00 b. $50.00 C. $450.00 O d. $ 150.00