Hi Pradip,
If you have already any WT for OT you can use it.
You can use different ways to calculate your OT on Sunday and Saturday with 150% rate. You can write a PCR to times the number of hours to your hourly rate(maybe comes from /002) or any WT you have already and times by 1.5
Another solution is using WT-dependent valuation. In this solution you can put 02 in "valuation base" field for your WT in V_T512W_O and put the "% rate" with 150.
Regards,
Omid