For the Case Study: Realizing The Dream Decision Making in Action I am having trouble locking down the correct mix of variable and fixed costs for the problem.

I'm struggling to answer these this question

1. Identify and compute the various types of cost for the company according to cost behavior. Determine the monthly fixed and variable costs for scan and lab services that the company incurs.

I've attached screen shots of what I have for variable and fixed costs, not sure if I'm computing things incorrectly or if I am just missing something?

Monthly fixed costs Item Total Cost Scan Lab Lab Technicians Salaries 400.00 un S 400.00 Administrative Assitant Salary S 125.00 S 62.50 S 62.50 Ultrasonagraphers????? 194.40 Depreciation of computer & printer $ 15.00 7.50 ur 7.50 Depreciation of furniture & fittings $ 21.00 S 10.50 S 10.50 Depreciation of Laboratory Equip. 47.33 47.33 Depreciation of Scan Equip. 30.00 un 30.00 Total fixed costs 638.33 $ 304.90 527.83