There isn't enough information here.
The common difference is 11, you can see this because the number goes up by eleven each time.
If we are finding x it would be 36
Step-by-step explanation:
Area=Base×Height
=12×5
=60
$26,000 because 25,000 × 0.06 = 1,500.
1,500 + 25,000 + 26,000