Answer:
The relevant cost of the 150 kilograms of the raw material when deciding whether to proceed with the special project: $979.
Explanation:
We do not use the original cost $2,236 because it is sunk cost.
We do not use market value because Otool Inc. does not either incur this cost nor sacrifice any benefit from not buying at market price.
The relevant cost of these raw material should be the benefit sacrificing from not selling the raw material, instead using it in the project; calculated as:
Selling price x Amount sold - Cost of delivery = 7.1 x 150 - 86 = $979.
Thus, the answer is $979.