A logistic company has compiled data regarding the distance covered $(x_1)$ by its transit prime movers along with the weight of cargo $(x_2)$ carried within a period of $12$ months in the year $2020.$ The management feel that these are the main drivers of the company's repair and maintenance cost $(Y)$ incurred on its fleet of trucks assembled as follows:

$\backslash$table$[[$Period$,x_1($in $\text{'}000\text{'}km),x_2($in $000$ metric tons$),Y($ksh $000)],[$January$,12,56,1840$