Answer: There are 1400 bottles he has to sell each month to meet his goal.
Explanation:
Since we have given that
Number of bottles of a new medicine = 4200
Number of months = 3
We need to find the number of bottles he has to sell each month to meet his goals.
So, Number of bottles in each month would be

Hence, there are 1400 bottles he has to sell each month to meet his goal.