pre_text: Foreign Currency Translation Impact on Consolidated Financial Results Since we are a U.S. domiciled company, we translate our foreign currency-denominated financial results into US Dollars. Due to the changes in the value of foreign currencies relative to the US Dollar, translating our financial results from foreign currencies to US Dollars may result in a favorable or unfavorable impact. Historically, the most significant currencies that have impacted the translation of our consolidated financial results are the euro, the Australian dollar, the Mexican peso, the British pound, the Canadian dollar, the Brazilian real and the Chinese Renminbi. The following table presents the approximate favorable or (unfavorable) impact foreign currency translation had on certain of our consolidated financial results
table: (In millions) 2019 vs. 2018 2018 vs. 2017
table: Net sales $ (137.2) $ (43.4)
table: Cost of sales 98.4 31.7
table: Selling, general and administrative expenses 16.3 1.0
table: Net earnings (15.7) (8.2)
table: Non-U.S. GAAP Adjusted EBITDA (25.3) (11.1)
question: Analyse this data from a financial earnings document. What is the difference between the impact of cost of sales for 2019 vs. 2018 and 2018 vs. 2017?