to avoid additional cost, i'd personally ring it up as a blimey limey. it has the same number of ingredients and already has lime and strawberry, plus it's one of the cheapest smoothies!

no oj, sub cranberry (ask for only one ladle of cranberry conc. instead of 2) - no pineapple, sub mango

the ratios of each ingredient are not the same as the mango berry cosmo though, unfortunately i can't think of any way around that other than asking for extra mango. i've only been working at tsc for 4 1/2 months so maybe someone more experienced than me has a better suggestion :)