Exercise $9-17($Algorithmic$)($L$0.5)$

In $2022,$ the CEO of Crimson, Inc., entertains $5$ clients at a skybox in Memorial Stadium for a single athletic event during the year. Substantive business discussions occurred at various times during the event. The box cost $$6,100$ per event and seats $7$ people. $($The cost of a regular, nonluxury box seat at Memorial ranges from $$55$ to $$110.)$ Refreshments served during the event cost $$1,920($the refreshments were obtained from a local restaurant and were separately itemized on the bill Crimson received$).$

How much of these costs may Crimson deduct