Recalculate Actual Units and Cost When Duration % Complete Changes

I have an activity with 2 resources.  The first resource is a labor resource with budgeted manhours only (no costs, non-driving).  This resource is merely for showing budgeted manhours per activity.  The second resource is a material resource with specific units and costs per unit.

I would like to use the "Recalculate Actual Units and Cost" for the labor resource only so that the "actual" manhours are updated based on the activity's duration % complete.  However, I do not want the material resource to recalculate based on % complete because the actual units will be updated manually based on actual field quantities.

Is there a way to use the "Recalculate Actual Units and Cost" function for the labor resource, but not the material resource.  It seems that this function, when selected, applies on an "all-or-none" basis regardless of the individual resource's settings.