Cathy, the manager of Cathy's Catering, Inc., uses activity-based costing to compute the costs of her catered parties. Each party is limited to 20 guests and requires 4 people to serve and clean up. Cathy offers two types of partiesan afternoon picnic and an evening formal dinner. The breakdown of the costs follows. Activities (and cost drivers) Advertising (parties) Planning (parties) Afternoon Picnic $ 85 per party $ 92 per party Renting equipment (parties, guests) Obtaining insurance (parties) Serving (parties, servers) Preparing food (guests) Formal Dinner $ 85 per party $128 per party $ 53 per party plus $11 per guest $ 190 per party $ 59 per server per party $ 20 per guest $ 72 per party plus $25 per guest $450 per party $ 66 per server per party $25 per guest Per party costs do not vary with the number of guests. Required: a. Compute the cost of a 20-guest afternoon picnic. b. Compute the cost of a 20-guest evening formal dinner. c. How much should Cathy charge for each guest for each type of party if she wants to cover her costs?