Answer:
The answer is $15000000.
Step-by-step explanation:
Gross profit in 2016 is $60000000, 2017 is $40000000 and 2018 is $50000000.
Calculation of 2016 is = Estimated gross profit x (actual cost to date ÷ total cost)
= $60000000 x ($40000000 ÷ $ 160000000)
= $15000000
The method remains same to calculate the gross of every year.