A golf specialty wholesaler operates $50$ ?weeks per year. Management is trying to determine an inventory policy for its $?1-$ irons, which have the following $?$ ?characteristics:

follows

Demand

$?($ D $)=2,500$ ?units $/$ year

Demand is normally distributed

Standard deviation of weekly demand $?=3$ ?units

Ordering cost $?=?$ $ $30/$ order

Annual holding cost $?($ H $)=?$ $ $6\mathrm{.}00?/$ unit

Desired cycle $-$ service level $?=85\%$

follow Lead time $?($ L $)=3$ ?weeks

$1.$ ?If the company uses a periodic review $?$ ?system, P should be what?

$2.$ ?T should be how many units?

$3.$ ?If the company uses a continious review system, R should be how many units?