Answer:
Note The full question is attached as picture below
1). Purchasing cost = 10,000* $18
Purchasing cost = $180,000
Making cost = Direct material + Direct labor + Variable overhead
Making cost = $65,000 + $55,000 + $30,000
Making cost = $150,000
Difference in cost (Per unit) = ($180,000-$150,000) / 10,000\
Difference in cost (Per unit) = $3
Change in net income = $180,000 - $150,000
Change in net income = $30,000 (Decrease)
2. Purchasing cost = 10,000*$18
Purchasing cost = $180,000
Making cost = Direct material + Direct labour + Variable overhead + Fixed overhead
Making cost = $65,000 + $55,000 + $30,000 + $20,000
Making cost = $170,000
Difference in cost (per unit) = ($180,000 - $170,000) / 10,000
Difference in cost (per unit) = $1
Change in net income (decrease) = $170,000 - $180,000
Change in net income (decrease) = $10,000
3. Purchasing cost = $180,000 - $20,000
Purchasing cost = $160,000
Making cost = Direct material + Direct labour + Variable overhead + Fixed overhead
Making cost = $65,000 + $55,000 + $30,000 + $20,000
Making cost = $170,000
Change in net income = $170,000 - $160,000
Change in net income = $10,000 (increase)
