The cost function given is \( C(x) = 2.83x + 1,350 \). In this function, the term \( 2.83x \) represents the variable cost, which depends on the number of umbrellas produced (x), and the constant term \( 1,350 \) represents the fixed cost, which is incurred regardless of how many umbrellas are produced.
Thus, the initial value is 1,350, which represents the fixed cost.
So the correct response is: The initial value of 1,350 represents the fixed cost.