Step-by-step explanation:
Given,
His earning before course = $ 8000 per year,
According to the question,
During the course, his earning = = $ 4000 per year,
So, the remaining earning that he lose during course = 8000 - 4000 = $ 4000,
Now, the fees of course = tuition fee of 1,400 per semester + semester fee of $ 500 per semester
If the course has 3 semester,
Then the total fees of the course = 3 × ( 1400 + 500 )
= 3 × 1900
= $ 5700,
Hence, his investment in getting the degree = 5700 + earning for 1.5 year
= 5700 + 1.5 × 4000
= 5700 + 6000
= $ 11,700
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