Formal is like writing to professors. like this, The other day I was with a couple of friends at a cinema. After watching the film the Manager came towards us.... ect ect
Answer:
1) We went to Target and bought eggs, cheese, milk, bread, and pizza rolls.
2) Their book bags were sitting on a table over there.
Explanation:
1) Target should be capitalized
2) Use of commas when creating a list
3) The third sentence missuses there vs their, (there meaning location, their meaning possesion)
When Blacks were salves they had a home and something to eat. But when they got free during reconstruction, they had nothing at all which is why they they went back to the owners