Bonne Ltd makes four soda products O, P, Q and R using the same material and production processes. They have used absorption costing system in the past, using machine hours to allocate overhead costs to their products. They are now looking to allocate costs using either variable costing system or activity-based costing system. Further information relating to the four products for 2021 are given below: Direct labour costs 23 per hour and direct material costs 8 per litre. Using absorption costing system, what is the overhead absorption rate per unit for Product P ? E