The production planner for a private label soft drink maker is planning the production of two soft drinks: root beer $(R)$ and sassafras soda $($S$).$ There are at most $12$ hours per day of production time and $1,500$ gallons per day of carbonated water available. A case of root beer requires $2$ minutes of time and $5$ gallons of water to produce, while a case of sassafras soda requires $3$ minutes of time and $5$ gallons of water. Profits for the root beer are $$6\mathrm{.}00$ per case, and profits for the sassafras soda are $$4\mathrm{.}00$ per case. The firm's goal is to maximize profits.

What is the time constraint?

$2R+3S720$

$2R+5S720.$

$3R+2S720$

$3R+5S720.$

$5R+5S720.$