Fellow Monks

I was working on an arithmetic script when I received an interesting error

Argument "(49)" isn't numeric in subtraction (-) and so on

What constitutes a number in parentheses as nonnumeric? What should I do, granted I am working from a data set that is very large and more than one numeric value is in parentheses?

Sample Data

(15) 20
(3) 50

[download]

Sample code that is being used to determine these values

$amount{$stock}+=($value[1] - $value[0])

Cheers.

In reply to numbers in parentheses not considered numeric values?? by gghelpneeded

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