On November 1, 2017, National Company sold inventory to a foreign customer. The account will be settled on March 1 with the receipt of 200,000 foreign currency units (FCU). On November 1, National also entered into a forward contract to hedge the exposed asset. The forward rate is $0.80 per unit of foreign currency. National has a December 31 fiscal year-end. Spot rates on relevant dates were:

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.