Combining several transactions into one

Hello. I hope you are well and in good spirits today.

I buy water at one of those semi-automated ice-and-water roadside stations. The local one takes credit cards. But I have to insert the card for each fill; that is, if I have eight bottles, there will be four transactions when I load the Google sheet. (It’s a two-spout thingamajig.)

How can I combine these piddling little transactions into one?

Thank you.

Hmm. Haven’t seen a Merge Transactions tool. Maybe it wouldn’t be too much work to create a manual transaction equal to the sum of the individual transactions and then delete the individual transactions?