A family friend has asked your help in analyzing the operations of three anonymous companies operating in the same service sector industry. Supply the missing data in the table below: (Loss amounts should be indicated by a minus sign. Round your percentage answers to nearest whole percent and other amounts to whole dollars.)

	a	b	c
sales	470000	820000	550000
net operating income		48000
average operating assets	155000		151000
return on investments	18%	20%
minimum required rate of return
percentage	15%		12%
Dollar amount		49000
residual income			4000