A certain Medium Scale Enterprise profits from 2 sources – manufacturing profit and trading
profit. In the financial projections for the company, these are expressed in terms of "units". If,
in a particular year, the results of the company’s two branches are as follows:
Branch A: -5 units of manufacturing minus 4 units of trading = R13million profit
Branch B: 2 units of manufacturing minus 4 units of trading = R8million profit
Then the value of a unit of manufacturing for that year is