APL Internet Services has analyzed its customer and order handling data for the past year and has determined the following cost

Order processing cost per order $ $4$

Customer tech support calls $($per call$)7$

Additional costs if tech support is after hours $12$

Relationship management costs $($per customer per year$)$ $$950$

In addition to these costs, product costs amount to $80\%$ of sales. In the prior year, APL had the following experience with Tapper Recreation, one of its customers:

Sales $$9,400$

Number of orders $42$

Calls to tech support $62$

Percent of tech support calls after hours $40\%$

For the coming year, APL has told Tapper Recreation that it will be switched to an activity$-$based pricing system. In addition to regular prices, Tapper will be required to pay:

Order processing $($per order$)$ $ $7$

Customer tech support calls $($per call$)15$

Additional costs if a tech support call is after hours $28$

Calculate the total revenue to be billed to Tapper Recreation if activity is the same as in the prior year. Show all calculations.