Materials are added only at the beginning of a process. For this month, 30 units received materials at a cost of $96. The beginning WIP of 4 units had the previous month's (last month) materials cost of $23. What is this month's materials unit cost under the FIFO and weightedaverage methods?

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FIFO A.$3.50 Weighted-Average $3.50 B.$3.50 $3.20 C.$3.20 $3.50 D.$3.20 $3.20