Current Attempt in Progress Riverbed Limited uses the FIFO cost formula in a perpetual inventory system. Fill in the missing amounts for items [1] to [18] in the following perpetual inventory schedule: 14 [13] $12$144 [2] [3] \$ [4] [5]\$ [6] \$ [10] [11] \$ [12] \$ [14] [15]\$ [16] [17]\$ [18] \$