急!Econ嘅問題,諗咗好耐都唔識,麻煩各位指教指教

The company that you manage has invested $5 milion in developing a new product, but the development is not quite finished. At a recent meeting, your salespeople report that the introduction of competing products has reduced the expected sales of your new product to $3 million. If it would cost $1 million to finish development and make the product, should you go ahead and do so? What is the most that you should pay to complete development?