The following direct materials variance computations are incomplete: Price variance = ($? $7) 10,800 kg

Question:

The following direct materials variance computations are incomplete:
Price variance = ($? − $7) × 10,800 kg = $5,400 U
Efficiency variance = (? − 10,400 kg) × $7 =? U
Flexible budget variance = $?
Requirement
Fill in the missing values and identify the flexible budget variance as favourable or unfavourable.