MS Excel ADD function doubt (currency) format

Hello how to add 2 numbers if it is represented in dollar sign in excel ?
eg $5 + $5 = 0 this is the o/p im getting in exceldoubt

as in the screenshot Im getting correct answer for first one but not for second!!

Hi Jishnu, this is one of the ways to add $60 and $40 to get $100 as the output: