Assume a companys activity$-$based costing system includes three activities with the following activity rates:Activity Cost PoolActivity RateTravel$ $2$per mile drivenDeliveries$ $50$per deliveryCustomer service$ $22$per phone callTwo of the companys many customers include Customer A and Customer B$.$ These two customers consumed the companys activities as follows: Total Expected ActivityCustomer ACustomer BTravel $($number of miles driven$)300250$Deliveries $($number of deliveries$)155$Customer service $($number of phone calls$)2012$If the company earned $$1,210$ in revenue serving Customer B$,$ then what is the customer margin for this customer?