An investor obtained a fully amortizing mortgage five years ago for $175,000 at 11.5% for 30 years. Mortgage rates have dropped so that a fully amortizing 20-year loan can be obtained at 10%. There is no prepayment penalty on the mortgage balance of the original loan, but 3 points will be charged on the new loan and other closing costs will be $3000. All payments are monthly. What is the effective "return" earned by the investor if he refinances

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What is the relationship between marginal external cost, marginal social cost, and marginal private cost? a. marginal social cost equals marginal private cost plus marginal external cost. b. marginal private cost plus marginal social cost equals marginal external cost. c. marginal social cost plus marginal external cost equals marginal private cost. d. marginal external cost equals marginal private cost minus marginal social cost. marginal external cost a. is expressed in dollars, so it is not an opportunity cost b. is an opportunity cost borne by someone other than the producer c. is equal to two times the marginal private cost d. is a convenient economics concept that is not real

Assume the perpetual inventory method is used. 1) the company purchased $12,500 of merchandise on account under terms 2/10, n/30. 2) the company returned $1,200 of merchandise to the supplier before payment was made. 3) the liability was paid within the discount period. 4) all of the merchandise purchased was sold for $18,800 cash. what effect will the return of merchandise to the supplier have on the accounting equation?