help me with this task (management accounting)

A company has created a viable prototype of a product. It now needs to be market tested and designed to meet competitive and consumer needs. This will cost 4,000,000. There is an 80 per cent probability that the product will be launched at a price of 150 per unit and the demand and contribution is shown in the table below. If only 150,000 units were sold they could be made using spare capacity that already exists, with a variable costs of 30 per unit. Higher quantities would need to be outsourced at a price of 50 per unit. Produce a decision tree and comment on the information it provides