Hello Joseph,
Thanks for downlloading the solutions. As far as question 7 (e) is concerned the answer provided is correct in my opinion.
(i) R & D cost: although the company is planning to incurr, but still such R & D is being done only for the purpose of testing compatibility (Technical Feasibility). The product can be produced only after that and the company can expect revenue. so it is nessesary to perform such test. In other words it can not be avoided. so it can be termed as Comitted Cost. But we have to classify the same, only among the categories mentioned in the question. That's why I had classified the same as Sunk Cost.
(ii) Profit of Telephone Instrument Division: Yes it is Opportunity Cost and the Term Notional Cost is just only an another name of Opportunity Cost.
Thank You Again,
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