Sheffield 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: Sheffield 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: Sheffield 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