Retail GST investigation arm finds Tata Starbucks guilty of profiteering Rs 4.51 crore Updated : April 30, 2019 03:03 PM IST This kept the retail sale price of the product pre and post GST rate reduction intact. Sources said the DGAP has concluded its investigation in March and found that Starbucks profiteered Rs 4.51 crore. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.