Question
Four boys, Simon, Zane, Ian and Daniel saved some money. Zane's savings was 310 of the total savings of Simon, Ian and Daniel. Simon's savings was 40% of the total savings. Ian's savings was 12 of the total savings of Zane and Daniel. If Zane's savings was $600, how much less was Ian's savings than the total of the other three boys?
4 m

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Four boys, Simon, Zane, Ian and Daniel saved some money. Zane's savings was 310 of the total savings of Simon, Ian and Daniel. Simon's savings was 40% of the total savings. Ian's savings was 12 of the total savings of Zane and Daniel. If Zane's savings was $600, how much less was Ian's savings than the total of the other three boys?