exam Maths Puzzle Numerical Ability

again, another problem that is almost done but i dont understand what my teacher wants?...please help!!!

here's the problem..and what my teacher wants is at the end of this prob

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exam Other Question

Sally bought three choclate bars and a pack of gum and paid $1.75. Jake bought two choclate bars and four packs of gum and paid $2.00 Find the cost of a choclate bar and the cost of the gum. true or false?
the lateral area of a prisim is the sum of the areal of its bases.