Using the grid technique, determine the least$-$cost location:

Customer

Tons

Grid Coordinates

A

$100$

$(1$;$11)$

B

$300$

$(7$;$11)$

C

$200$

$(5$;$9)$

D

$500$

$(7$;$7)$

E $,\mathrm{.}1000$

$(1$;$1)$

The Grid center coordination is and $($round the results to $2$ decimal places$)$

$(2\mathrm{.}10$;$4\mathrm{.}55)$

$(2\mathrm{.}66$;$6\mathrm{.}78)$

$(3\mathrm{.}67$;$5\mathrm{.}10)$

$(4\mathrm{.}77$;$5\mathrm{.}20)$

$(3\mathrm{.}09$;$4\mathrm{.}80)$