Can someone help with explanations for the entire table, please? Especially August 27th?

Thank you.

Crane Department Store uses a perpetual inventory system. Data for product E2-D2 include the following purchases. Date Number of Units Unit Cost May 7 45 $10 July 28 25 13 On June 1, Crane sold 20 units, and on August 27, 44 more units. Prepare the perpetual inventory schedule for the above transactions using FIFO. Product E2-D2 Date Purchases Cost of Goods Sold May 7 June 1 July 28 Aug. 27 $ 450 325 +A $ LA 200 i 486 LA $ $ tA Balance 450 250 575 89