I think the answer is: $12.75+ 4m
Then the total cost of the drinks is: $12.00
I think that because they already gave you the price of the pizza but you have to add the drinks so it tells me that Kiyo bought 4 medium drinks so I put m for medium drinks. And I put it as 4m because there are 4 drinks and you need to multiply it so it put m right next to it to show multiplication. the expression looks like this: $12.75+4m
And to find the total cost of the 4 medium drinks, I multiply 4 and $3.00 which equals $12.00