Lights Incorporated calculates cost for an equivalent unit of production using the weighted$-$average method.

Data for July:

Work$-$in$-$process inventory, July $1$:

$36,500$ units

Direct materials $(99\%$ completed$)$

$$122,450$

Conversion $(51\%$ completed$)$

$$76,850$

Balance in work in process inventory, July $1$

$$199,300$

Units started during July

$90,500$ units

Units completed and transferred

$102,900$ units

Work$-$in$-$process inventory, July $31$:

$24,100$ units

Direct materials $(99\%$ completed$)$

Conversion $(51\%$ completed$)$

Cost incurred during July:

Direct materials

$$180,500$

Conversion costs

$$288,500$

Cost per equivalent unit for materials under the weighted$-$average method is calculated to be:

A$.$ $$1\mathrm{.}99.$

B$.$ $$2\mathrm{.}39.$

C$.$ $$2\mathrm{.}99.$

D$.$ $$3\mathrm{.}09.$

E$.$ $$3\mathrm{.}19.$