I started to mess around with, but then got busy with other things.
When I was working on it, ImageSearch wasn't get that to find the images I made. I noticed the background behind the numbers has a gradient, so idk how that would effect the images that would be needed to search. Also, if i remember correctly, the numbers now start selected but after you send input, they are no longer selected. So that changes how they look between the first change and the 2nd.
Another thing, unrelated to the Abs specific part. It always bugged me that any number with cents came out with lots of zeros. So I set the percision to 2 decimal points. Add the following line near the top of the script and you will only get the correct cents format.
<font class="small">Code:</font><hr /><pre> SetFormat, FLOAT, 0.2 </pre><hr />