A company uses the gross profit method. If the estimated rate of gross profit is 45%, what is the estimated cost of merchandise inventory on June 30, based on the following date?

June 1 Merchandise Inventory $100,000

June 1-30 Purchases (net) 190,000

June 1-30 Sales (net) 90,000

a.$245,500

b.**$240,500

c.$230,500

d.$214,500

The correct answer is B, but can you show me you to get that answer and why that is the answer please