Hi Nabeel,
If the time values you provided are Minutes:Seconds, you can paste this formula in V14:
=SUM(IF(ISBLANK(D14:U14),0,TIME(--LEFT(D14:U14,FIND(":",D14:U14)-1),--RIGHT(D14:U14,2),)))
If the time values you provided are Hours:Minutes, you can paste this formula in V14...