def sales_record(record: list, which: tuple) -> list:
    """
    Add one sale to the sepcified salesperson and
    the product number. Return a list with the
    updated sale record.
    -----------------------
    Parameters:
    - record: list
        Two-dimensional array that contains the record
        of each salesperson's sale.
    - which: tuple
        The first argument specifies which product (row),
        the second argument specifies which salesperon (col).
    """
    row = which[0] - 1
    col = which[1] - 1

    record[row][col] += 1

    return record