Answer:
$7,500
Explanation:
Integrating the daily marginal cost per unit function (C'(x)) at the interval from 0 to 300 units gives us the total variable cost incurred by Ditton in producing he first 300 units.
![C'(x) = 0.0006x^2 -0.12x+ 22\\\int\limits^(300)_0 {C'(x)} \, dx = C(x)|_0^(300) = (0.0002x^3 -0.06x^2 +22x)|_0^(300) \\C(300) - C(0) = (0.0002(300)^3 -0.06(300)^2 +22(300)) - (0.0002(0)^3 -0.06(0)^2 +22(0)) \\C(300) - C(0) =6,600](https://img.qammunity.org/2020/formulas/mathematics/college/7mtfjqi5mx41ik9i6xgbqn46gwxsn7ajhb.png)
The variable cost incurred is $6,600
The total cost is given by sum of the variable cost and the fixed cost:
![C= 6,600+900\\C=\$7,500](https://img.qammunity.org/2020/formulas/mathematics/college/dbvcgwmnt9p5o3p8pg3rrto6jnkjwrcgx8.png)
The total cost incurred by Ditton in producing the first 300 units of these toaster ovens per day is $7,500.