Luther Corporation Luther Corporation's total sales for 2019 were $610.1 million, and gross profit was $109.0 million. Inventory days for 2019 is closest to: 153.7 27.5 33.4 10.9. and if so how would you exploit it? How much would you make on a block trade of 100 shares? No, no arbitrage opportunity exists. Yes, buy on NASDAQ and sell on NYSE, make $25. Yes, buy on NASDAQ and sell on NYSE, make $250. Yes, buy on NYSE and sell on NASDAQ, make \$25