The question is attached but I would like to know how

Could you address the numbers in BOLD in the question below? Using the formula givin, I get $266,000 not $267,606

Franklin Corporation has three operating departments (Fabricating, Assembly, and Finishing) and two service departments (Custodial and Administrative). The following information has been provided:
	Custodial	Admin	Fabricating	Assembly	Finishing
Dept Costs	250,000	400,000	--	--	--
# employees	10	--	80	100	60
Sq ft	--	15,000	30,000	35,000	20,000
Allocations are based on the following:
Custodial:	Square feet
Administrative:	Number of employees
Required:
Franklin has been approached by Sparkle Cleaning to outsource the custodial service. Assuming all costs are variable, what is the relevant cost of the custodial department to compare with the Sparkle Cleaning bid?
Correct answers:	My answers
Custodial = $250,000 + (10/(10 + 80 + 100 + 60) Admin)	266,000	I do not get $267,606
Admin = $400,000 + (15,000/(15,000 + 30,000 + 35,000 + 20,000) Custodial)
Custodial = $267,606
Admin: $400,000 + 40,141 = $440,141 [$400,000 + (.15 $267,606 = $40,141)]	437,500	I do not get $440,141
Custodial: $250,000 + 17,606 = $267,606 [ $250,000 + (.04 $440,141 = $17,606)]