Max. score: $1\mathrm{.}00$

A firm operates $200$ days per year. The production rate of the firm is $200$ couplings per day. The steady coupling rate is $50$ per day. Additionally, it takes $$4$ for storing each coupling per year. Setup cost for the machine is $$70$ per run. Determine what would the pure consumption portion of the cycle.

$10\mathrm{.}2$ days

$9$ days

$15\mathrm{.}2$ days

$11\mathrm{.}4$ days