Over time formula assistance needed

Hi,
I have attached a Time Sheet with formula's for calculating OT based on the time worked. If there is no time worked the subsequent number in the "worked" column (G) is zero, which then should leave no OT balances, they should be zero as well. Can anyone help with changing the formula so a zero balance in the "worked" column (G) will equal a zero balance in the "STO" column (H) as well? This should apply to all other over time columns (I, J) as well, they should remain at zero when there are no hours worked.

I would appreciate any help on this. I also appreciate the previous help.

Thanks,
Russ