Note book is $20
calculator is $2.50 less than five times the cost of a notebook, then:
5 * $20 - $2.50 = $100 - $2.50 = $97.50
calculator: $97.50
notebook: $20
Total cost: $97.50 + $20 = $117.50
answer: total cost of one calculator and one notebook: $117.50
