Making Journal Entries-by-product

Espana Company makes one main product, Uno, a by-product, Dos, which splits off from the main product when the work is three-fourths completed. Dos is sold without further processing and without being placed in stock. During June, $1,200 is realized from the sale of the by-product. Make the entries to record the recovery and sale of the by-product, on account, on the assumption that the recovery is treated as one of the following:

a. A reduction in the cost of the main product.

b. Other income