C https://sunyrockland.open.suny.edu/webapps/blackboard/content/contentWrapper.jsp?content_id=_1143756_1&displayName=Exa. The Discover credit card is advertising a special 5% cash-back bonus on all grocery store and restaurant purchases. Discover Card users also receive the regular 1% cash-back bonus on all other purchases. Imagine that you typically charge a total of $2,000 a month. Of those $2,000 charged, 1/4 is for purchases in grocery stores and restaurants. Use this information to calculate the amount of your monthly cash-back bonus. Select your answer from the following choices. O $100 O $400 O $120 O $30 O $40