Boston Cycles started October with 12 bicycles that cost $ 42 each. On October 16 comma Boston bought 40 bicycles at $ 68 each. On October 31 comma when the average cost per unit was $ 62.00​, Boston sold 34 bicycles for $ 100 each. Boston​'s cost of goods sold under the​ FIFO, LIFO and​ weighted-average methods is summarized as​ follows: