. A lump-sum tax of $300 on each producer of hamburgers. . A tax of $1 per burger, paid by producers of hamburgers. Which of the following statements is true as a result of the lump-sum tax? Check all that apply. Average fixed cost will decrease. O Average total cost will increase. O Average variable cost will increase, O Marginal cost will remain unchanged. Which of the following statements is true as a result of the per-burger tax? Check all that apply. Marginal cost will remain unchanged. Average variable cost will increase. Average fixed cost will remain unchanged. Average total cost will increase