Roger and his dad built a bookshelf. They assembled it in the garage, but then they had to carry it to the other side of the house to put it in Roger's bedroom. The table below shows how much each board weighs. Board LocationWeightNumber of Boards sides240 N2 back320 N1 top and bottom40 N2 shelves50 N3 How much total weight did Roger and his dad have to carry?
