Cinnamon Corp. started business in 2017 and uses the weighted average cost method.

During 2017, it purchased 45,000 units of inventory at €10 each and sold 40,000 units for €20 each. In 2018, it purchased another 50,000 units at €11 each and sold 45,000 units for €22 each. Its 2018 cost of sales (€ thousands) was c losest to:

A . €490.

B . €491.

C . €495. 

Assume the companies use a periodic inventory system.