One farm has 640 ha of land for growing peanuts and soybeans. In 1ha acres, peanuts make a profit of $ 60 and soybeans make a profit of $ 80. It is known that 1ha peanut crops require 45h labor and cost $ 100 capital. For soybeans, it requires 60h labor and $ 80 capital. The farm estimates that it has a reserve workforce of 36,000 h and a capital of $ 60,000 per year. How much land should be allocated for each crop to get the maximum profit?