Number eight is the one that I’m asking about and I just wanted to see if I did it right and if I didn’t can you show me how thank you

At the start of the day, there are 78 boxes in the warehouse, but then 19 of the boxes are shipped; so:
78 - 19 = 59 boxes are left
Each box contains 116 DVDs, then:
59 x 116 = 6844 DVDs left in the House