Annual profit in thousands of dollars is given by the function p(x)=-, 1x^2 + 50x - 300, where x is the number of items sold, x is greater or equal to 0.

Describe the meaning of the number 300 in the formula, in terms of its meaning in relation to the profit.

The most likely answer is

1x^2 represents variable costs
-300 represents fixed costs regardless
of x which will determine profit along
with
50x representing income, which will vary according to x.