Shopping Roundup at checkout

[AJ73]

Hi,

Hopefully you can help, I am trying to create a shop for a charity that I work for and we are looking for the option for our shoppers to also make an additional donation after they finish shopping.

So is it possible that at checkout, the shopper is able to round up their purcahse amount to a round figure, thus making an optional donation to the charity?

So for example, they buy a wristband for £3.50, could we set it so they can increase that paid amount to £5 or £10?

Thanks
Ashley

[eradio]

I am looking for this exact feature also? Does it exist? If not, anyone interested in creating this mod for pay?