A—Purchase contract B—Market research
C—Competitive advantage D—Cash flow
E—Real profit F—payroll tax
G—Payment certificate H—The profitability of the enterprise
I—Business operation J—Profit and loss
K—Business transaction L—Base tariff level
M—Gross profit N—Net profit
O—Application for insurance
Example: (O) 申请保险 (F) 工薪税

A—Purchase contract B—Market research
C—Competitive advantage D—Cash flow
E—Real profit F—payroll tax
G—Payment certificate H—The profitability of the enterprise
I—Business operation J—Profit and loss
K—Business transaction L—Base tariff level
M—Gross profit N—Net profit
O—Application for insurance
Example: (O) 申请保险 (F) 工薪税（）实际利润（）基础税率

A—Purchase contract B—Market research
C—Competitive advantage D—Cash flow
E—Real profit F—payroll tax
G—Payment certificate H—The profitability of the enterprise
I—Business operation J—Profit and loss
K—Business transaction L—Base tariff level
M—Gross profit N—Net profit
O—Application for insurance
Example: (O) 申请保险 (F) 工薪税