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accounting help

Roc3, Inc. engaged in the following inventory transactions this period: Date Purchase Beg. 50 Units @ $20 cost each 1/10 1/15 35 Units @ $18 cost each 1/20 1/25 20 Units @ $16 cost each O $680. O $1,150. O $800. Sale O $1,270. 40 Units @ $35 retail each Using a periodic approach, What is Roc3's ending January inventory using FIFO? 25 Units @ $35 retail each