Answer: The answer is provided below
Explanation:
The total of the research and development expense is $3180000. This was gotten by the addition of the:
Basic research to develop the technology = 2000000
Engineering design work = 680000
Development of prototype device= 300000
Testing and modification of the prototype = 200000
Total = 2000000 + 680000 + 300000 + 200000 = $3180000.
Further explanation has been attached in the journal.