How to calculate the proportion of high-tech output value

LZ refers to the high-tech enterprises (the kind that enjoys tax refund) that apply for key state support. If yes, the specific requirements are: the income of high-tech products accounts for more than 60% of the total sales revenue, and the income of products with core independent intellectual property rights (including patent certificates or software copyright certificates) accounts for more than 50% of the income of high-tech products. It is generally recognized that only last year's audit, and the audit of research and development expenses is nearly three years.