Please explain how to get the total for Sales and what number you used to multiply with.

Duweynie Company designs landscape plans and plants the material for clients. On April 1, there were three jobs in process, Jobs 39 , 40, and 41 . During April, two more jobs were started, Jobs 42 and 43 . By April 30, Jobs 40,41 , and 43 were completed and sold. The following data were gathered: Overhead is applied at the rate of 110% of direct labor cost. Jobs are sold at cost plus 30%. Selling and administrative expenses for April totaled $4,550. (Round all amounts to the nearest dollar.)