Answer and Explanation:
The computation of the material cost per ton month wise is as follows:
Cost per unit in September
= $76,000 ÷ 800 units
= $95 per unit
ANd, Cost per unit in October is
= $77,350 ÷ 850 tons
= $91 per unit
As we can see that the cost per unit would reduced by $4 per unit that comes from
= $95 - $91
= $4