To calculate the profit function \( P(x) \), we need to subtract the cost function \( C(x) \) from the revenue function \( R(x) \):
\[ P(x) = R(x) - C(x) \]
Given:
- \( R(x) = 24x \)
- \( C(x) = 2x + 1364 \)
Substituting these into the profit function:
\[ P(x) = 24x - (2x + 1364) \]
Now, simplify the equation:
\[ P(x) = 24x - 2x - 1364 \] \[ P(x) = 22x - 1364 \]
Now, we want to determine how many units \( x \) must be produced for the business to make a profit of $2376. We set \( P(x) = 2376 \):
\[ 22x - 1364 = 2376 \]
To solve for \( x \), first, add 1364 to both sides:
\[ 22x = 2376 + 1364 \] \[ 22x = 3740 \]
Now, divide both sides by 22:
\[ x = \frac{3740}{22} \] \[ x = 170 \]
Thus, the number of units that must be produced for the business to make a profit of $2376 is \( \boxed{170} \).