Personally I don't do the dvds, I do Just sweat on the Just dance games. Just dance 4 cardio just sweat is fantastic, after 40 mins you can defo feel the aches and it helps burn around 100 cals.
not sure about costa
I am not sure about costa, but I know in starbucks if you use skimmed milk as your HEA, then a venti (large) skimmed latte is 4 syns. 350 mls is your HEA and its 2 syns per 100ml skimmed milk after that- A venti is 551 ml milk.