If the actual level of activity is 4% more than planned, then the fixed costs in the static budget should be increased by 4% before comparing them to actual costs.
If the actual level of activity is 4% less than planned, then the costs in the static budget should be reduced by 4% before comparing them to actual costs.
A revenue variance is unfavorable if the actual revenue is less than what the revenue should have been for the actual level of activity for the period.
At the end of the period, the balance of the Raw Materials account should equal the total of the balances (dollar amount) on the materials ledger cards.