Bartolo Delivery has two divisions, air express and ground service, that share the common costs of the companys communications network, which are $8,100,000 a year. You have the following information about the two divisions and the common communications network:Calls (thousands) Time on Network (hours)Air express 609,000 372,500Ground service 261,000 1,117,500Required:Determine the cost allocation if $4.86 million of the communications network costs are fixed and allocated on the basis of time on network