Ric makes a great point. The if you came up short on the sod - would not the HO insist that you complete the job for the agreed upon amount? In this case the agreed upon amount was $2450 to repair the front lawn. If the job gets completed to their satisfaction does it matter that less sod was needed?
How would this be different than a applicator charging the client for lawn care....the lawn is weed free....he never needs to spray a post emergent spray....the lawn still looks great anyway...does he need to give a refund on the years service? Was not the agreed upon amount not the agreed upon amount.