A$).$ If the opening inventory is $500$ units, demand is $800$ units, and production is $700$ units, what will be the ending inventory? $(3$ marks$)$

$$

B$).$ A production line is to run at $1000$ units per month. Sales are forecast as shown in the following. Calculate the expected period$-$end inventory. The opening inventory is $500$ units. All periods have the same number of working days $(6$ marks$)$

$$

$$

Period

$$

$1$

$2$

$3$

$4$

$5$

$6$

Forecast

$$

$780$

$820$

$1030$

$1400$

$1000$

$880$

Planned production

$1000$

$1000$

$1000$

$1000$

$1000$

$1000$

Planned inventory

$500$

$720$

$900$

$870$

$470$

$470$

$590$