Biology: H Course Materials ... GRLContent PitchVantage ISA General Business WileyPLUS Microsoft account rel Question 4 of 4 14.44/19 E Koester, Inc., states in its 2020 10-K filing with the SEC, "In October 2020, two major credit rating agencies changed Koester's long term credit rating outlook to negative and one of the credit rating agencies reduced Koester's short-term credit rating." Koester's financial statements (in $000) follow. Koester, Inc. Comparative Income Statement For the Year Ended December 31 2020 2019 2018 Sales revenue $5,179,016 $5,102,786 $4,960,100 Cost of goods sold 2,806,148 2,692,061 2.530.617 Gross profit 2,372,868 2,410,725 2,429,483 Operating expenses 1,708,339 1,679,908 1,643,773 Operating income 664,529 730,817 785.710 Interest expense, net 42,279 58,081 61,611 Other non-operating (income), net (29.799) (23,518) (16,755) Income before income tax 652,049 696,254 740,854 Income tax expense 235,030 123,531 203,222 Net income $417,019 $572,723 $537,632