Difference between order earnings and funds paid into ebay account

[ilkeston-iron]

Hello I'm new to selling on ebay so please forgive if you have heard this all before I sold an item and after all the fees all said and done my earnings were £12.30 once this was paid into my eBay account it was down to £8.88 ? I just cannot identify where the difference has gone inhave looked on the transaction activity page but nothing stands out to me any help would be much appreciated.

 

[tobiasd4]

You are selling items with free delivery. 

So buyer pays you total, you then use this money to buy postage through ebay.

[ilkeston-iron]

Yes I am I can see that I have had fees for the postage like in the screen shot from the original sale but in the transaction page I can see another separate fee for postage is this normal or have I done something that has resulted in a second fee 

[tobiasd4]

Postage fee is deducted when you buy it.

This means you may use funds from previous sales, as you don't get new funds released immediately buyer pays.