It looks like you have a problem related to profit maximization. To solve it, I would need a specific profit function, which could be in the form of a quadratic, linear, or another type of equation, typically involving the number of items $x$.

Could you provide the profit function?

For example, it could be something like:

$P(x) = ax^2 + bx + c$

Then we would solve $P(x) = 1200$ to find the production levels.

Let me know if you have more details!