Farm Frenzy

A farmer has $10$ acres to plant in wheat and rye. He has to plant at least $7$ acres. However, he has only $1200$ to spend and each acre of wheat costs $200$ to plant and each acre of rye costs $100$ to plant. Moreover, the farmer has to get the planting done in $12$ hours and it takes an hour to plant an acre of wheat and $2$ hours to plant an acre of rye. If the profit is $500$ per acre of wheat and $300$ per acre of rye how many acres of each should be planted to maximize profits? Give your answer as a pair in the form $(x,y)$ where $x:wheat,y:rye$