If you go to this example: … ?type=smpl

and enter 999999999999 in the price column and 999999 in the quantity column the answer is : 999998999999000100 but should be 999998999999000001

My local application is exhibiting the same issue, could you please send through a fix for version 1.5 of dhtmlx professional



The issue can’t be fixed. In your case data exceed the maximum safe size of float number, which cause rounding and not expected result.
The reason of problem not the logic of component but limits of JavaScript, so it is not fixable.