Round Dimensions to Nearest 1/2 Foot?

Is this possible? Maybe by labeling the whole MU and the whole SU, precision = 0, with SU set to = 1/2 MU?

 

My MU = US Survey Ft, SU = US Survey In. I need to keep it in US Survey Ft, I don't really care what the SU are, as long as it doesn't mess up my anno scales.

 

MS V8i SS3