Senior moment at the Chippy

How many carrier bags does it take to hold fish and chips three times, a sausage, three lots of curry sauce and a portion of mushy peas? I plainly thought just the one, because as it was handed over, I turned on my heel and left Blakeley's fish and chip emporium in Ship St, Brighouse.
On my arrival back at home, however, it was pointed out to me - somewhat harshly I feel - that my solitary carrier only contained three portions of chips and one fish. A hasty phone call to the shop revealed two further bags were still there. At this point the owner offered to bring them round for us, and I was able to thank him in person, albeit rather embarrassed for my momentary lapse into a senior/craft moment.