Answer:
Hi, the information you have provided is missing information regarding the Budgeted Sales of 1-gallon containers During the year.
However, the following points are provided to help solve the problem.
The Beginning inventory of 1-gallon containers on January 1, 2018 can be determined using the missing figure approach.
Production Budget for the year end December 31, 2018
1-gallon containers
Budgeted Production 1,200,000
Less Budgeted Sales (amount missing) XXX
Less Budgeted Closing Stock (300,000)
Budgeted opening Stock XXX