21-23 with explanation please

21) Corp is a printer for forty-six customers. For the year 2015,O/H cost estimates total $840,000 for an annual production capacity of 12 million pages. For 2015, it decided to evaluate the use of additional cost pools. After analyzing O/H costs, it was determined that number of design changes, setups, and inspections are the primary O/H cost drivers. The following information was gathered during the analysis: During 2015, two customers, Money Managers and Hospital Systems, are expected to use the following services: Using pages printed as the only O/H cost driver, what is the O/H cost estimate for Money Managers for 2015? 22)Corp makes two models of office chairs, a standard and a deluxe model. The following activity and cost information has been compiled: Assume a traditional costing system applies the O/H costs based on DLH. What is the total amount of O/H costs assigned to the standard model? 23)Number of setups and number of components are identified as activity-cost drivers for O/H. Assuming an activity-based costing ( ABC ) system is used, what is the total amount of O/H costs assigned to the standard model