The following selected data were taken from the accounting records of Colorado Enterprises: Month Machine Hours Manufacturing Overhead May 46,000 $889,000 June 60,000 $1,130,000 July 68,000 $1,274,000 August 52,000 $980,000 Manufacturing overhead consists of three different costs; (1) machine supplies (variable), (2) property taxes (fixed), and (3) plant maintenance (semivariable). July's overhead costs were $136,000 for machine supplies, $19,200 for property taxes, and $1,118,800 for plant maintenance. Determine the machine supplies cost for May.

Risk is the risk of a decline in a bond's value due to an increase in interest rates. this risk is higher on bonds that have long maturities than on bonds that will mature in the near future. risk is the risk that a decline in interest rates will lead to a decline in income from a bond portfolio. this risk is obviously high on callable bonds. it is also high on short-term bonds because the shorter the bond's maturity, the fewer the years before the relatively high old-coupon bonds will be replaced with new low-coupon issues. which type of risk is more relevant to an investor depends on the investor's , which is the period of time an investor plans to hold a particular investment. longer maturity bonds have high risk but low risk, while higher coupon bonds have a higher level of risk and a lower level of risk. to account for the effects related to both a bond's maturity and coupon, many analysts focus on a measure called , which is the weighted average of the time it takes to receive each of the bond's cash flows. conceptual question: which of the following bonds would have the largest duration? a)10year-zero coupon bonds b)10year-7% annual coupon bonds c)10year-3% annual coupon bonds d)5year-3% annual coupon bonds e)3year-7% annual coupon bonds