So no receipts from the Mac App Store like in iTunes?

[space-time]

if you buy several songs from iTunes, one song at a time, do they charge your Credit Card each time, of they wait several days and make a lump charge? I think the CC companies charge merchants a small fee for each transaction, so it may make sens for Apple to wait 2-3 days and charge you for 10 songs, rather then 10 small charges of 99 cents each.

I wonder if that is also maybe a strategy for Mac App store?