Creta has the following gross requirements.

$\backslash$table$[[$Week$,1,2,3,4,5,6],[$Requirements$,80,50,70,110,100,70]]$

Setup cost of Rs$\mathrm{.}400,$ inventory holding cost of Rs$\mathrm{.}8$ per unit per week. There is no beginning inventory and no scheduled receipts. The demand pattem is expected to continue for the remainder of the year. Which is cheaper: lot$-$for$-$lot or fixed order of $80?$

$[4]$