Answer and Explanation:
The computation is shown below;
(a)
Purchase price of Land $1,101,100
Add: Fair value of restoration $112,500
Less: residual value -$125,000
Developmental costs $250,000
Total $1,388,600
Divided by Tons available for mining 58,200
Per unit Material cost $23.00
(b) Inventory $178,480 (29100 - 21340) × $23
(c ) Cost of goods sold $490,820 (21340 × $23)