add comma to large numbers

[talkncloud]

Is your feature request related to a problem? Please describe.
some of the values returned by the estimator can be quite large and is difficult to read.

                                                    DAILY (USD)     $14000 
                                                   WEEKLY (USD)     $105002
                                                  MONTHLY (USD)     $420010

Describe the solution you'd like
add a comma in the appropriate place using math lib or similar.

                                                    DAILY (USD)     $14,000 
                                                   WEEKLY (USD)     $105,002
                                                  MONTHLY (USD)     $420,010

Describe alternatives you've considered
none