How much is a portion of chips?

just had a chippy tea.

fish, £5

chips, £2.20

battered sausage, £1.80

curry, £1.50

breadcake, 80p

dandelion and burdock, 80p

Chips                                 £2.50

Large chips                      £3.30

Chip roll                           £3

Chips and cheese            £4.30

Chips and curry sauce   £4.30