[Solved]-The graph is not equal on the basis of the addition code in Highcharts-Highcharts

your data returns string as y values, instead of number. i.e parsefloat(24.00).tofixed(2), is incorrect, because returns "24.00" not 24.00

you can use something like this:

parsefloat(parsefloat(24.00).tofixed(2));