Suppose Sears uses the perpetual inventory system and purchases $600,000 of sporting goods on account from Nike

Question:

Suppose Sears uses the perpetual inventory system and purchases $600,000 of sporting goods on account from Nike on April 10, 2014. Credit terms are 1/10, net 30. Sears pays electronically, and Nike receives the money on April 20, 2014.
Journalize Sears'
(a) Purchase
(b) Cash payment transactions. What was Sears' net cost of this inventory?