I'm looking to try something that a large comparison site do, where they show the percentage of savings and actual savings against the average price
merchant 1: £100
merchant 2: £180
merchant 3: £220
merchant 4: £300
total saving would be £200 - cheapest to dearest = 300% saving (This is what I currently use)
Total of price column / num merchants = Average price would be £200, so there would be a £100 saving against the average saving = 100% saving
would this be possible?