Stow Logistics is considering launching a new delivery service. The market could be excellent. uable or unstable with respective revenues of GH 30,000. GH20,000, GH15.000 a month. The probability of the market conditions being excellent, and unstable is 0.2 and 0.3 respectively. If the service would incur a fixed cost of GHC 2000 per month, what is the expected monthly return