Machinery Acquired at a Cost of $80,000 and on Which $\$ 120,000$

Machinery acquired at a cost of $80,000 and on which there is accumulated depreciation of $55,000 (including depreciation for the current year to date) is exchanged for similar machinery. Assume that the transaction has commercial substance. For financial reporting purposes, present entries to record the exchange of the machinery under each of the following assumptions: (a) Frice of new, $\$ 120,000$ ; trade-in allowance on old, $\$ 4,000$ ; balance paid in cash.
(b) Price of new, $\$ 120,000$ ; trade-in allowance on old, $\$ 34,000$ ; bal ance paid in cash.