$NyX$ Camera, which $is$ a newly established camera manufacturer, has just calculated the result

after testing its warehouse operation for a month. The warehouse has a total area $of$ about

$15,000m2$ with a height $of8m.It$ initially has been separated into four distinct spaces $to$ serve

different warehouse functions, including: $2,500m2$ used for good$-in$ process, $7,000m2$ used

for storage products, $2,000m2$ used for picking and doing value$-$adding services, $2,500m2$ for

packing and preparing $to$ dispatch, and the rest $is$ used for the aisle. However, after a month.

the experiment result reported that the storage utilisation $is$ only $56\mathrm{.}4\%1\mathrm{.}5m1\mathrm{.}2m0\mathrm{.}15m0\mathrm{.}3m0\mathrm{.}4m0\mathrm{.}5m$