A bus is mostly filled with passengers and ready to travel from Los Angeles to San Francisco. At the last minute, a person comes running up to the bus and takes a seat. The change in the bus company's total cost as a result of transporting one more passenger on this trip is called:

A) variable cost.
B) marginal cost.
C) average total cost.
D) fixed cost.
E) opportunity cost.

Frugala is when sylvestor puts $2,000 into 10-year state bonds and $3,000 into 5-year aaa-rated bonds in steady hand hardware, inc. he buys the four state bonds at a 5 percent interest rate and the three steady hand bonds at a 6.5 percent rate. sylvestor also buys $1,500 worth of blue chip stocks, and $800 worth of stock in a promising new sportswear company that reinvests its earnings in new growth. 1. (a) what is the maturity for each of the bond groups sylvestor buys? (b) the coupon rate? (c) the par value?