Sudden increase because you have to do your job

Yesterday I called Battery clinic in East London, for a price on a 628 battery. I was advised that the price R1050. In the afternoon, my so went to go and replace and guess what,? The price went from R1050 to R1300. When he questioned it, he was advised it was because of transport cost. What transport cost. Carrying the new battery from the back to the car? *******