Answer:
10 Units would cost $78
Explanation:
We will be using the following equation to solve this problem

Where x will be the amount of units of coverage that are sold. The equation subtracts 1 from the amount of units sold (since the first unit costs $24) and multiplies that by $6 which is the cost per unit. Then it adds $24 to that, which gives us the total cost.
Since we sold 10 units of coverage we plug that into the equation




So 10 units of coverage sold would cost $78