C373 A Qualified Businessman

As a good businessman, Tao had developed a habit of keeping books.

"Seventy-seven forty-nine, eighty-eight sixty-four, thirty-nine..."

Tao Xiaotu skillfully used the multiplication formula to calculate today's accounts, and Tao Xiaotun was already used to her sister's unique calculation formula.

Every time she was in a dilemma, even the abacus was just a decoration in front of Tao Xiaosui