Mariot trades in its old equipment $($with the following carrying values$)$ for new equipment. Mariot received $$12,000$ cash on the exchange. The fair value of the new equipment is $$42,000.$

Original cost of old equipment $$30,000$

Accumulated depreciation on old equipment $$18,000$

If the transaction lacks commercial substance, what amount does Mariot assign to the new equipment?

Note: Carry all decimals in calculations; round the final answer to the nearest dollar.