Joe needs to purchase malt for his micro$-$brew production. His supplier charges $$35$ per delivery $($no matter how much is delivered$)$ and $$1\mathrm{.}20$ per gallon. Joe's annual holding cost per unit is $35\%$ of the dollar value of the unit. Joe uses $5,000$ gallons of malt per week.

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$4)$ How many gallons should Joe order from his supplier with each order?

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Answer:$\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

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$5)$ Suppose Joe were to order $3,800$ gallons each time he orders. How many orders per year would he place on average?

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