Format Causing Errors

I am assuming a formula can only return one type of variable/ Class (integer, currency, text etc) as I am getting an error using the following formula

image

All of the numbers produced by the formula is correct however the top 3 units are currency however units sold need to be a general number. This is why i try casting it to a general number. This cast does work when placed in the context of a tile visual. However when i place it on a graph it causes an error in which no data appears.

what would be causing this?

Thanks for any suggestions,

Yes what you’re are saying is true unfortunately. All results have to be in the same format when using this technique.

Okay thats unfortunate, thanks Sam.