Question $8(1\mathrm{.}2$ points$)$

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The production manager for the Coory scrit drink company is considering the production of two kinds of soft drinks: regular and diet. Two of her limited resources are production time $(8$ hours $=480$ minutes per day$)$ and syrup $(1$ of the ingredients$),$ limited to $675$ gallons per day. To produce a regular case requires $2$ minutes and $5$ gallons of syrup, while a diet case needs $4$ minutes and $3$ gallons of syrup. Profits for regular soft drink are $$3\mathrm{.}00$ per case and profits for diet soft drink are $$2\mathrm{.}00$ per case. Which of the following is not a feasible production combination?

$75R$ and $90D$

$40R$ and $100D$

$135R$ and $OD$

$90$R and $75$D