Question
For every colouring book Billy sells, he gets $4.30 as commission. He gets an additional $1.40 for every 6 colouring books sold. How many colouring books did Billy sell if he earned $63 in commission?
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For every colouring book Billy sells, he gets $4.30 as commission. He gets an additional $1.40 for every 6 colouring books sold. How many colouring books did Billy sell if he earned $63 in commission?