Pasting Functions

[pickel182]

this is either a really easy question or not possible...im making a price guide it is set up with each different item on top of each other and sizes going off to the right...i have the rows set up to add together all of the sizes for a total count...what im wondering is if there is an easier way to do the formulas, basically im looking to copy paste the formula somehow because they are all essentially the exact same formula...except different cells..any help on this is greatly appreciated thanks a lot