Raphael's Refining uses a weighted average process costing system. For a particular period, its opening inventory consisted of 100 items (60 per cent complete as to conversion costs) whose costs were $1600 made up of material $300 and conversion cost $1300. During the month, 1000 items were started and 950 were completed. Ending inventory of WIP was one-third complete. There was no spoilage. Costs placed in process during the month were materials $1600 and conversion costs $13 700. Materials are added at the halfway point. What is the amount of

cost that would be allocated to goods completed in the period?

A. $14,615 B. $16,513 C. $16,900 D. $16,150

Why D is answer? Please show me the calculation process.Thanks!