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Q$2.$ Horlicks has the following gross requirements for the next $8$ weeks:

$\backslash$table$[[$Week$,1,2,3,4,5,6,7,8],[$Requirement$,90,40,60,12,11,60,90,60],[$s$,,,,0,0,,,]]$

Ordering cost of Rs$\mathrm{.}500,$ inventory holding cost of Rs$.10$ per unit per week. There is a beginning inventory of $30$ and no scheduled receipts. The demand pattern is expected to continue for the remainder of the year. Which of the following is cheaper: lot$-$for$-$lot or two period balance?

$[5]$