Answer:
The answer is "$12000".
Explanation:
Calculating the total cost:
when 80,000 miles[tex]=(80,000\times 0.25)=\$20,000[/tex]
when 60,000 miles[tex]=(60,000\times 0.3)=\$18000[/tex]
[tex]\text{Calculating the per mile variable cost} =\frac{[\text{Total cost of highest level-Total cost of lowest level}]}{(Highest \ level-Lowest \ level)}[/tex]
[tex]=\frac{(20,000-18000)}{(80,000-60,000)}\\\\=\frac{(2,000)}{(20,000)}\\\\=\frac{(1,000)}{(10,000)}\\\\=\frac{(1)}{(10)}\\\\=$0.1 / mile[/tex]
So, the total fixed cost:
[tex]=20,000-(80,000\times 0.1)\\\\=20,000-8,000\\\\=\$12,000[/tex]