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 Ratios and proportions Unit prices The unit price is the price per item or per unit of measure. A 4-pound bag of rice costs $3.44. What is the unit price? Divide the total cost by the number of pounds.$3.44 ÷ 4 = $0.86 The unit price is$0.86 per pound. Find the unit rate. A 9-kg bag of mangoes for $13.5 =$ per kg