please answer it by showing all the steps, and formulas.

a Ostrich Enterprise is a small production firm that operates in Sweden. The company produces meatballs for canteens. During June 2020, the standard variable overhead has been budgeted as follows: 40,000 krona Budgeted variable overhead for the period Budgeted volume of production for the period 80,000 units Re- quired Actual variable overheads incurred during the period, which are under review, amounted to 56,000 krona, whereas the actual production were 96,000 units. Calculate the variable overhead variance