Please help. Please Include cell formulas

Brook Health Care Center Incorporated has three clinics servicing the Birmingham metropolitan area. The company's legal services department supports the clinics. Moreover, its computer services department Required Complete the spreadsheet to allocate the service costs using the step method. Spreadsheet Tip The supporting calculation section must be completed simultaneously with the allocation table. However, most of the supporting calculations can be completed first. The exception is that the value in cell C25 refers to the sum of cells C18 and C19. Supporting calculations: a) Cost to be allocated