A county wants to build one centrally-located processing facility to serve the county's four recycling drop-off locations.The four drop-offs have characteristics as given in the table below.What is the approximate centre of gravity of these four locations? 
Definitions:
Basis Points
A financial measurement unit representing the percentage shift in the value or rate of a financial asset, which is equal to one hundredth of a percent.
Yield To Maturity
The total return anticipated on a bond if the bond is held until its maturity date, expressed as an annual rate.
Duration
A measure of the sensitivity of a bond's or fixed income portfolio's price to changes in interest rates, often used to manage interest rate risk.
Modified Duration
A measure of the sensitivity of a bond's price to changes in interest rates, specifically reflecting how much the duration changes for a 1% change in yield.
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