Consider the following sample data for the relationship between advertising budget and sales for Product A: Observation 1 3 4 5 6 7 8 Advertising ($) Sales ($) 2 9 10 40,000 50,000 50,000 60,000 70,000 70,000 80,000 80,000 90,000 100,000 240,000 308,000 315,000 358,000 425,000 440,000 499,000 494,000 536,000 604,000 What is the R coefficient of determination value for the relationship between advertising and sales? Please round your answer to the nearest hundredth. Note that the correct answer will be evaluated based on the full-precision result you would obtain using Excel.