$.$ Average warehouse inventory levels

a$.$ Three warehouses

$2=2$

$1$

$\backslash$times $1$

$2=3$

$6\backslash$times $(3,000\backslash$times $6)=12,728$

b$.$ One warehouse

$2=1$

$6\backslash$times $(3,000\backslash$times $6)=7,348$

c$.$ Percentage reduction in system inventory

$$ From six to three: $29\mathrm{.}3\%$ reduction

$$ From six to one: $59\mathrm{.}2\%$ reduction