ProductTable: Negative Balance showing as less than a penny

[richardbirkin]

If a product has an earning of 1000 and a cost of 2000 then the balance should be -1000

Currently, because of the code that shows <0.01 for earnings less than a penny, all numbers that are negative are being rendered as <0.01 instead of their negative value

[g105b]

Referencing https://github.com/PhpGt/DomTemplate/issues/491 as this will be the long-term solution.