Diamond Company has three product lines, A, B, and C. The following financial information is available: Item Product Line A Product Line B Product Line C
Sales $70,000 $145,000 $32,000
Variable costs $42,000 $77,000 $20,000
Contribution margin $28,000 $68,000 $12,000
Fixed costs:
Avoidable $6,300 $19,000 $8,950
Unavoidable $5,000 $14,500 $4,000
Pre-tax operating
income $16,700 $34,500 $(-950 )

Assuming that Product Line C is discontinued and the manufacturing space formerly devoted to this line is rented for $6,000 per year, operating income for the company will likely:

a. Increase by $7,200.
b. Increase by $3,300.
c. Increase by some other amount.

Jenny​ walters, who owns a real estate​ agency, bought an old house to use as her business office. she found that the ceiling was poorly insulated and that the heat loss could be cut significantly if six inches of foam insulation were installed. she estimated that with the​ insulation, she could cut the heating bill by​ $80 per month and the​ air-conditioning cost by​ $70 per month. assuming that the summer season is three months​ (june, july, and​ august) of the year and that the winter season is another three months​ (december, january, and​ february) of the​ year, how much can jenny spend on insulation if she expects to keep the property for five​ years? assume that neither heating nor​ air-conditioning would be required during the fall and spring seasons. if she decides to install the​ insulation, it will be done at the beginning of may.​ jenny's interest rate is​ 6% compounded monthly.