You need to determine the optimal location for a distribution center that will serve $3$ retail locations. You superimposed an XY grid on a map in order to determine the location of each store relative to the other stores. Using the center of gravity method, what are the XY coordinates of the best location for the DC$?$

$\backslash$table$[[$Retail Location,X Coordinate,Y Coordinate,Shipments$/$Year$],[$A$,55,10,500],[$B$,30,40,800],[$C$,75,30,1000]]$