A car wash services $200$ customers in one hour on a lovely Saturday afternoon. The car wash employs $7$ washers at $$8$ per hour and uses $$50$ of water and $$5$ of electricity per hour. An appropriate measure of multifactor productivity is:

Question $44$ options:

$1\mathrm{.}03$ cars$/$$$.$

$3\mathrm{.}53$ cars$/$$

$1\mathrm{.}8$ cars$/$$$.$

$0\mathrm{.}97$ cars$/$$$.$