Lilypad Hot Tubs, Inc. reports the following information for August: Sales Revenue $ 900 comma 000 Variable Costs 310 comma 000 Fixed Costs 56 comma 000 Calculate the operating income for August using variable costing. A. $ 590 comma 000 B. $ 900 comma 000 C. $ 844 comma 000 D. $ 534 comma 000

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.