The table below shows the cost of office supplies.
Item Box of staples Box of pens Ream of paper Cost $1.50 $2.93 $5.17For each hour the office staff works, you earn $20.44. Use a formula to express the net income I, in dollars, that is the result H hours of work by the office staff less the cost of purchasing S boxes of staples, P boxes of pens, and R reams of paper.
?
A. 
B. ?
C. ?
D. ?
Answer: B
Mathematics
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