Clear View, Inc. provides quarterly commercial window cleaning services for three high-rise commercial buildings, Sequoia, Tower Plaza, and Cornwall, and it uses a job costing system for determining the costs for completing each job. ClearView guarantees its customers' satisfaction and will return to re-clean windows that do not meet the customer's requirements at no additional charge to the customer. The job cost system does not capture any cost incurred by ClearView for return touchups. ClearView cleans each building on a square footage contract price, which includes the initial cleaning as well as all required touchups. Each year, the company generates about one-third of its total revenues and gross profits from each of the three buildings. The Clear View owner has observed that the buildings, however, require substantially different levels of support following the initial completion of jobs. The following data have been gathered:

Assuming that each of the three customers produces gross profits of \($50,000\), which customer is the most profitable, after taking into account the support activity required for each building?

a. Sequoia

b. Tower Plaza

c. Cornwall

d. Can't determine from the information given.

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Support Activity Major touchups. Minor touchups.. Communication.. Driver Hours on jobs.... Number of visits Cost per Driver Unit $ 40 $160 Number of calls.... $ 20 Customer Sequoia Tower Plaza Cornwall. Major Touchups Minor Touchups Communication 48 898 16 224 12 50 24 48 40 120