Ruby’s & Rings Inc. offers a two-year assurance warranty against failure of its products. The estimated liability is 4% of sales in the year of sale and 6% in the second year. Sales for 2020 and 2021 were: $2,500,000 and $2,800,000, respectively. The company incurred no warranty costs in 2020 but in 2021 they spent $175,000 on repairs related to the warranties issued 2020 and 2021. The warranty provision at the 2020 year end was:.
a) $0.
b) $100,000.
c) $150,000.
d) $250,000.

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.