Recently, while eating lunch with your family at a local cafeteria, you observed a practice that is somewhat unusual. As you reached the end of the cafeteria line, an adding machine operator asked the number of persons in your group. He then totaled the food purchase on the trays for all of your family members and wrote the number of persons included in the group on the adding machine tape. He handed you the tape and asked you to pay after eating. Near the end of the meal, you decided to order a piece of pie and a cup of coffee so you returned to the line, selected your food, and again went through the same procedures. This time, the adding machine operator stapled the second tape to the original and returned it to you When you left the cafeteria, you handed the stapled adding machine tapes to the cash register operator who totaled the two tapes, took your money, and put the tapes on a spindle. REQUIRED: a. What internal controls has the cafeteria instituted for its operations? b. How can the manager of the cafeteria evaluate the effectiveness of the controls? c. How do these controls differ from those used by most cafeterias? d. What are the costs and benefits of the cafeteria's system