pleasant surprise

I went to buy a pair of trousers for my 13 year old son and found his size on a R400 per pants rack,<br> I went to pay for them but they never had the price tag on them so the cashier said he would have to extract the price tag/item number from the computer.after about two minutes he came back and said that that particular code/item is no longer on the system so they cant charge me the R400 and gave me the trousers for free.<br>