6 to 7 is 100 max attempts at 8 threads per attempt. Full Max Retail Price: 50,400 coupons / Max BA Panic Buy Cost: 30,400 Ingots

7 to 8 is 200 max attempts at 8 threads per attempt. Full Max Retail Price: 100,800 coupons / Max BA Panic Buy Cost: 60,800 Ingots

8 to 9 is 300 max attempts at 8 threads per attempt. Full Max Retail Price: 151,200 coupons / Max BA Panic Buy Cost: 91,200 Ingots

Total for all 3 levels: Full Max Retail Price: 302,400 coupons / Max BA Panic Buy Cost: 206,400 Ingots (~$4,000)

Obviously, final cost will highly depend on luck, how many free threads you acquire, how many you pick up during events, bought on sale/retail, bonus from the BA level up rebate, etc. Also, don't expect to get lucky with anything less than 80-90% of the meter filled.