Jason keeps a record of his transactions in a notebook. looking over his records for the past two weeks, jason finds that his bank statement does not match his notebook, and he actually has less money than he thought he did.

these are the relevant entries in jason's notebook:

however, jason's bank statement says that his ending balance is $473.33. which of the following is a possible explanation for the discrepancy?

a. jason actually made two $20 charitable donations but forgot to write one of them down.
b. jason listed the refund as a credit, but it should be a debit.
c. jason listed the groceries out of habit, but he did not actually purchase them this week.
d. jason transposed the digits on the microwave's price, which actually cost $86.74.

Suppose that a major city’s main thoroughfare, which is also an interstate highway, will be completely closed to traffic for two years, from january 2014 to december 2015, for reconstruction at a cost of $535 million. if the construction company were to keep the highway open for traffic during construction, the highway reconstruction project would take much longer and be more expensive. suppose that construction would take four years if the highway were kept open, at a total cost of $800 million. the state department of transportation had to make its decision in 2014, one year before the start of construction (so that the first payment was one year away). so the department of transportation had the following choices: (i) close the highway during construction, at an annual cost of $267.5 million per year for two years. (ii) keep the highway open during construction, at an annual cost of $200 million per year for four years. now suppose the interest rate is 80%. calculate the present value of the costs incurred under each plan.