Please help solve and explain if you can

3. Why does the total cost computed for 4,360 units not match the data for January? a. The high-low method is accurate only for months in which production is at full capacity. b. The high-low method only gives accurate data when fixed costs are zero. c. The high-low method gives a formula for the estimated total cost and may not match levels of production other than the highest and lowest. d. The high-low method gives accurate data only for levels of production outside the relevant range