Hmm...the last few were worth the most 
I'm guessing it was...
21 Nov- Order : No effect x3
25th Nov- Deposit : Increase, Increase, No effect.
21st Dec- 15 beds delivery: Decrease, No effect, Decrease
15th Jan- Increase, Decrease, Increase.
I might be wrong though...lol, but if i'm right, it doesn't seem too hard at all.
Those weren't the answers i put though
i have no idea what i put lol.
First one and second one are right
3rd is the one that gets tricky , 15 beds delivered means that sales is 7500, 2000 prepaid, 5500 debtors, + 750 GST
Cost Price means that stock control decreases 4500 and cost of sales increases/net profit decreases 4500
Overall
assets increase 1750 (increase 6250 (debtors + GST) - cost price 4500)
liabilities decrease 1250 (prepaid sales revenue decreases 2000, GSt liability increases 750)
Owners equity increase 3000 (sales increases 7500, less cost of sales 4500)
4th one
5 beds delivered
assets increase 1250 ( Debtors control 2500 + 250 GST less stock 1500), the fact that all money was paid is simply a restructure of assets. assets still increase tho
liabilities increase 250 (GST clearing 250)
Owners equity increases 1000 (2500 Sales revenue -1500 cost)