$2\mathrm{.}5$Consider

exercise

$2\mathrm{.}2.$

$($a$)$

Suppose

that

annual

percentage

rate

may

vary

up

to

$14\%$

per

product.

How

much

will

the

optimal

order

quantity

and

the

total

cost

vary?

Perform

the

robustness

analysis.

$($b$)$

Suppose

the

ordering

cost

may

vary

up

to

$

$650$

instead

of

$

$500.$

Compare

the

$

$650$

and

$

$500$

ordering

cost

by

performing

robustness

analysis.

$($c$)$

Perform

robustness

analysis

when

the

demand

is

$1100$

per

week

instead

of

$800$

per

week