The net profit of the test group has increased by 2622 yuan (The profit of hatchable eggs has increased by 2190 yuan, and the medication cost has decreased by 432 yuan. ).
试验组每月增加纯利：2622元（种蛋收入增加2190元，减少用药成本432元）。
The net profit of the test group has increased by 2622 yuan (The profit of hatchable eggs has increased by 2190 yuan, and the medication cost has decreased by 432 yuan. ).
试验组每月增加纯利：2622元（种蛋收入增加2190元，减少用药成本432元）。
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