Randolph is a 30percent partner in the RD Partnership. On January 1, RD distributes $15,000 cash, inventory with a fair value of $20,000 (inside basis of $10,000), and a parcel of land with a fair value of $10,000 (inside basis of $5,000) to Randolph in complete liquidation of his interest. RD has no liabilities at the date of the distribution. Randolph's basis in his RD Partnership interest is $37,000. What is Randolph's basis in the distributed inventory and land?

A) $10,000 inventory, $10,000 land. B) $10,000 inventory, $5,000 land. C) $20,000 inventory, $10,000 land. D) $10,000 inventory, $12,000 land. The answer id (D)

Please explain how to calculate these nunmbers.