I. When the activity measure is the number of units sold, the revenue variance is favorable if the average actual selling price is greater than expected. II. A favorable spending variance occurs when the actual cost is less than the amount of the cost in the static planning budget. III. A revenue variance is favorable if the actual revenue is greater than the revenue in the static planning budget. Multiple Choice Only statement I is true. Only statement It is true. Only statement ili is true. None of the staterisents are true