Question : Remove leading characters in a string, convert to integer, add, convert back to string

Using Javascript...

I have two strings that begin with '$ '.  
I need to convert them to integers after stripping off the first two characters.  
Then, I need add them them and convert the result to a string, adding back the '$ ' characters at the beginning.

Answer : Remove leading characters in a string, convert to integer, add, convert back to string

oops. forgot to prepend the '$'
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