Sam Inc. uses the weighted average method of process costing. The company$$s ending work in process inventory consisted of $8,000$ units that were $80\%$ complete. Materials are added at the beginning of processing. The direct materials cost per equivalent unit was $$3\mathrm{.}20,$ and the conversion cost per equivalent unit was $$1\mathrm{.}80.$ What is the amount of cost Sam would assign to ending work in process inventory?

$$28,480$

$$37,120$

$$32,000$

$$40,000$