27.52%。 The operating income of Litchi Factory is 325.72 million yuan, the total cost is 260.3238 million yuan, the tax and surcharge are 2.9252 million yuan, the total profit is 65.3962 million yuan, the total profit and tax is 77.34./kloc-0.66 million yuan, the after-tax net profit is 49.0472 million yuan, and the total tax payment is 28.2944 million yuan, with the investment profit rate of 36.70%.