Let, x number of video were manufactured per day.
Expense per day :
1250 - 4x
Now, income per day :
12x
Profit is given by :
......1 )
1) How many videos must the company sell in one day to equal its daily costs.
So, P =0
0 = 16x - 1250
x = 78.125
So, at least 79 video per day should be sell.
2) If the manufacturer can increase production by 20 videos per day, what would their daily profit be.
Here, x = 79 + 20 = 99
Putting this in equation 1 ) we get :
Hence, this is the required solution.