The main post office in Tampa, Florida, is due to be replaced with a much larger, more modern facility that can handle the tremendous flow of mail that has followed the city's growth since $1970.$ Since all mail, incoming or outgoing, travels from the seven regional post offices in Tampa through the main post office, its site selection can mean a big difference in overall delivery and movement efficiency. Using the data in the following table, help Postmaster Purushottam Meena calculate the center of gravity location for the proposed new facility.

$\backslash$table$[[$Regional Post office,Map Coordinates $(x,y),$Truck Round Trips per Day$],[$Ybor City,$(18,12),10],[$Davis Island,$(15,11),10],[$Dale$-$Mabry,$(12,17),9],[$Palma Ceia,$(16,18),13],[$Bayshore$,(7,3),12],[$Temple Terrace,$(8,9),10],[$Hyde Park,$(14,16),17]]$

The center of gravity is:

$x-$coordinate $=,($round your response to two decimal places$).$