The total cost of the computer, the muffin maker and the stand mixer is $360. The stand mixer costs twice as much as the muffin maker. The computer costs thrice as much as the total price of the stand mixer and muffin maker. How much less does the stand mixer cost than the computer?

Stand Mixer	Muffin Maker	Computer
2 u	1 u
3 u		9 u
2 u	1 u	9 u

Cost of the muffin maker = 1 u
Cost of the stand mixer = 2 u

Total cost of the muffin maker and the stand mixer
= 1 u + 2 u
= 3 u

Cost of the computer
= 3 x 3 u
= 9 u

Total cost of the stand mixer, the muffin maker and computer
= 9 u + 1 u + 2 u
= 12 u

12 u = 360

1 u = 360 ÷ 12 = 30

Amount that the stand mixer cost less than the computer
= 9 u - 2 u
= 7 u
= 7 x 30
= $210

Answer(s): $210