Grand Rapids Department Store utilizes the retail inventory method. Grand Rapids' beginning inventory cost $140,000 and retailed for $280,000. Purchases for the period amounted to $390,000 and were priced to sell at twice that amount. Sales for the period, all at normal retail, were $600,000. How much is the cost of Grand Rapids' estimated ending inventory?

Group of answer choices

$300,000

$115,000

$230,000

$150,000