Why not giving the right change.

Was at Algoa Spar 25/02/2025 . I bought items and paid the amount. My change must be R54.10 but the Cashier Name: Kelly only give me R54. I asked her why is she not giving me my right change. Why not giving my 10c also. If you take that Spar can withhold 10c from 10000 customers each day that is R100 a day that Spar or somebody is taking its R700 a week ×4 R2800 a month. Who take the money if you take 10c from customers. The till slip shows the Cashiers the exact amount change cash for the customers.