2304 of nether wart on each level, that's 36 stacks each level. There are 3 levels that's 108 stacks or around 3 inventories of nether wart.
2304 x 3 = 6912
6912 * $18 (18 is the estimate of the drug) = $124,000
*NETHER WART ONCE FULLY GROWN CAN PRODUCE 2-4 NETHER WARTS PER ONE PLANT.
124,000 (for 2 nether warts per plant and this includes replanting