A warehouse worker is completing product inventory. Records show that 123 boxes of textbooks and 23 cases of paper have already been counted on previous pallets. A new pallet contains 31 boxes of textbooks and 9 cases of paper. If each box of textbooks contains 4 textbooks and each case of paper contains 10 reams, how many textbooks are currently in inventory? A. 124 B. 186 C. 616 D. 936