Practice problem $2.$ MajorNet makes high$-$speed Internet connectors

Static budget:

Budgeted variable costs $=$$$\frac{145}{?}$ connector

Budgeted fixed costs $=$$$7,\frac{500}{?}$ month

Based on production and sales of $100$ connectors in November

Actually, produced and sold $84$ connectors

Actual total cost $=$$$21,000$

Total flexible budget cost for $84$ connectors $\frac{?}{?}$ month $=$

$2-1)$ Sales volume variance for total cost $=.$

$2-2)$ Is this variance good news?

$3-1)$ Flexible budget variance for total cost $=$

$3-2$ Is this variance good news?