Correct script(date calculation)

[mick1234]

Hi fellos, 

Can somebody have idea why my calculation stop counting  and reset calculation based on 24 hours? 

((round(((((hour(((RangeSum((EVENT_TS2)))-min(TOTAL (RangeSum((EVENT_TS2)))))))*60))+minute(((RangeSum((EVENT_TS2)))-min(TOTAL (RangeSum((EVENT_TS2)))))))*60000/TPR))))

[bing_jville]

Could you add the TPR as a column in the table?