Yes and no. Yes certainly the skills you describe are more in the financial category and help more, if you need to choose. But one really should be able to do b

Yes and no. Yes certainly the skills you describe are more in the financial category and help more, if you need to choose. But one really should be able to do both monitoring and simple calculations in one's head, at least getting into the range of the actual result. If you pay your single chicken leg with a $50 note and don't expect "more than $40 change" in return, then this can be bad for your finances as well.