<u>Given:</u>
Annual demand = 410 units
Ordering cost = $41
Holding cost = $5 unit per year
<u>To find:</u>
Number of units to be ordered each time an order is placed
<u>Solution:</u>
On calculating the number of units,

Therefore, to minimize the total cost, approximately 77 units should be ordered each time an order is placed.
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To remove almost all of the sodium and minerals