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Markets and the Competitive Environment (Study Plan 10.4) 5. Sales of the rms in the tattoo industry are: Sales Firm (dollars per year) Bright Spots 450 Freckles 325 Love Galore 250 Native Birds 200 Other 15 rms 800 Calculate the four-firm concentration ratio. What is the structure of the tattoo industry? 6. Walmart, Grocery, Target Top Personal Care Market Share A Personal Care Study conducted by TABS Analytics shows that Walmart has a 19.4 percent share of the $40 billion personal care market, while grocery stores Kroger and Publix have a 16.6 percent share, and Target, 12.8 percent. Source: drugstorenews.com, March 23, 2017 Estimate a range for the four- rm concentration ratio and the HHI for the US. personal care mar- ket based on the data provided in this news clip