Read the complete problem before answering. teresa bought 2 1/2 gallons of chocolate milk at the dairy farm. chocolate milk cost $4.50 a gallon. how much did teresa spend on the milk? a student solved the problem this way. gallons 2 1/2 = 2.5 gallons let n represent the amount teresa spent on the milk. n = 2.5 × $4.50 n = $11.25 teresa spent $11.25. use a similar strategy to solve this problem. pedro bought 1 1/4 lb of red sand and 5 1/2 lb of brown sand to refill his sand box. both types of sand cost $4.60 a pound. how much did pedro spend on the sand?