On 3rd June 201x when the new store is completed, Large Mart orders 250 interactive screens from Milano for a price of $500 per interactive screen; these interactive screens arrive on 4th June 201x. The interactive screens are purchased on credit and paid via EFT at the end of the month.

On 6th June 201x, UNE purchases 100 interactive screens for the business department for a price of $1,900 per interactive screen on credit. Two days later UNE notices that they have ordered far too many interactive screens and asks Large Mart to return 20 unused interactive screens. Lage Mart allows UNE to return the 20 excess interactive screens and returns them to inventory of the store. UNE then pays the remaining interactive screens on the 9th of June 201x after deducting an early payment discount of 10%.

On 10th June 201x, Large Mart purchases another 200 interactive screens from Milano at a special price of $700 per interactive screen. The interactive screens arrive on the same day, and Large Mart pays this new delivery of interactive screens via EFT three days later. On 20th June 201x, Large Mart holds an end of financial year sale. On the 21th June 201x Large Mart sells 150 interactive screens to La Trobe University (LTU). LTU purchases the interactive screens on credit for a list price $1,600 per interactive screen. However, LTU also received a volume discount of $50 per item at time of purchase (reducing the price of each interactive screen to $1,550).

Question : Provide all journal entries that are necessary in the books of Large Mart to account for all purchase, sales and returns transactions (including the payment and receipt of funds) of the new store, assuming that Large Mart uses a perpetual inventory system on a first-in-first-out basis.