Profit is 4-2.25=1.75 per coaster, so she needs to sell 70/1.75=40 coasters.
Jan Is Making Clay Coasters For An Art Fair. Each Coaster Costs $2.25 To Make. If She Sells The Coasters For $4.00 Each, How Many Will She Have To Sell To Make A Profit Of Exactly $70.00?
40 coasters if my calculations are correct