abby and her 5 friends went to a restaurant to buy sodas. if they bought 2 of each size soda which expression should be used to find the total amount of money spent on sodas

If they EACH bough 2 of EACH size soda, then it would be.

S: # of different sized sodas

P: Price of soda

5*2 (S*P)

but if each sized sodas cost a different amount it would be

S: Price of first size

S2: Price of second size

S3: Price of third size

and so on.

5*2 (S+S2+S3 ...)

but if they all together bought 2 of EACH size soda, then it is.

2 (S*P)

but if each sized sodas cost a different amount it would be

S: Price of first size

S2: Price of second size

S3: Price of third size

and so on.

2 (S+S2+S3 ...)