Cosmo Co. purchases goods for resale from Galaxy, Inc. The amount of a recent purchase is $12,500 with terms of 3/10, n/30. Cosmo later returns $500...

. Cosmo Co. purchases goods for resale from Galaxy, Inc. The amount of a recent purchase is $12,500 with terms of 3/10, n/30. Cosmo later returns $500 worth of the goods. Under the perpetual inventory method, what is the journal entry to record the return? Please show equations, thank you.