When Scrooge is eating in the tavern on Christmas Eve, he is reading a book with the spine label "Bankers Book". Charles Dickens' depiction of this book is that it is Scrooge's property, possibly a ledger. Yet in the film, Scrooge stands, pays the innkeeper for the meal, and leaves - leaving the book behind him on the table.
Scrooge after originally firing Bob for ruining his hat tells the latter he owes him a shilling as the hat was 16 shillings and six pence. Scrooge being the miser he is could had still taken back the wages he payed Bob which was 15 shillings. So mathematically Scrooge could had saved another 15 shillings if he did just that.
On Christmas morning after Scrooge gets out of bed, he temporarily removes his robe, but then puts it back on, unfastened. He then goes to the window and opens it, yelling down to a boy in the street. As he leans out the window, the robe is suddenly fastened with two buttons near his waist.
After Bob is fired by Scrooge for throwing the snowball at him, he sadly walks behind the man with a goose; at different shots he has his scarf nesting right on his shoulder joint, and then hanging freely in front of him, and then back on his shoulder.
Even though Bob, Tiny Tim and the rest of the family are poor like in the novel they seem well off. For example they wear fancy clothing during Christmas dinner in the Present sequence and their home is middle class. Considering how Bob only got payed 15 shillings a week it is a wonder how they live so well.