The formula to determine the materials to be purchased is Multiple choice question. (budgeted production times materials required for each unit) plus budgeted ending materials inventory minus beginning materials inventory (budgeted production divided by materials required for each unit) plus budgeted ending materials inventory minus beginning materials inventory (budgeted production times materials required for each unit) minus budgeted ending materials inventory plus beginning materials inventory (budgeted production divided by materials required for each unit) minus budgeted ending materials inventory plus beginning materials inventory