38. A flour mill has 20 workers. To gain more profit, it adds a noodle processing project, using the flour produced by the mill to process into noodles (producing $1 \mathrm{~kg}$ of noodles requires $1 \mathrm{~kg}$ of flour). It is known that each worker can produce an average of $600 \mathrm{~kg}$ of flour or process $400 \mathrm{~kg}$ of noodles per day. Selling flour directly yields a profit of 0.2 yuan per kilogram, while processing it into noodles and selling yields a profit of 0.6 yuan per kilogram. If each worker can only do one job per day, and other factors are not considered, when $\qquad$ workers process noodles, the mill's total profit per day is maximized, and the maximum profit is $\qquad$ yuan.
Answer: 12; 2880