Lantto Air uses two measures of activity, flights and passengers, in the cost formulas in its budgets and performance reports. The cost formula for plane operating costs is $34,810 per month plus $2,850 per flight plus $12 per passenger. The company expected its activity in June to be 70 flights and 292 passengers, but the actual activity was 69 flights and 291 passengers. The actual cost for plane operating costs in June was $236,550.