To find the number of t-shirts, we must add the individual cost of producing 1 shirt and equate it to 5.33. Since 200 is the cost of the set-up fee, we divide this by an unknown x, for the individual cost. We add 5, which is the cost to produce a shirt. We now have 200/x + 5 = 5.33. Find the value of x, which is 606, nearest to 600. Therefore approximately 600 t-shirts must be produced.
