An analyst does research about free cash flow and gathers the following information about a company:
·Cash provided by operating activities is $22000
·Cash used for fixed capital expenditures is $6000
·Net debt repayment is $850
·Interest paid is $3000
·Income tax rate is 35%
·Depreciation and amortization is $1000
The free cash flow to the firm is closest to:（）
A. $16950
B. $17950
C. $18950