ANSWER: This problem cannot be solved because there is not enough data given. Option C is the most correct option.
EXPLANATION: when setting up a business, we consider all alternative of production, and determine the one that has a lower cost and still gives the best output, that is optimization.
For the question: it cannot be solved because of the negative sign in the cost, which needs to be explained further in the question. This cost cannot be entered into book keeping unless more explanation is given to the negative sign, as cost is not revenue. It is the money spent already and should have a positive sign.