A company reports the following information regarding its inventory.

Beginning inventory: cost is $80,000; retail is $130,000

Net purchases: cost is $65,000; retail is $120,000

Sales at retail: $145,000

The year-end inventory shows $135,000 worth of merchandise available at retail prices. What is the cost of the ending inventory calculated using the retail inventory method?

a. 78300

b. 72900

c. 105000

d. 73125

e. 135000