Bingo's Copy Center needs to buy white paper and yellow paper. Bingo's can buy from three suppliers. Harvard Paper sells a package of 20 reams of white and 10 reams of yellow for $60, Yale Paper sells a package of 10 reams of white and 10 reams of yellow for $40, and Dartmouth Paper sells a package of 10 reams of white and 20 reams of yellow for $50. If Bingo's needs 350 reams of white and 430 reams of yellow, how many packages should it buy from each supplier to minimize the cost? Harvard \\:| packages Dartmouth \\:| packages What is the least possible cost? $:l