Stanley Marks had the following petty cash transactions in April of the current year. Apr $2$ Write a $$300$ check to establish a petty cash fund. Apr $4$ Purchased paper and other supplies for the office for $$48\mathrm{.}20$ that is immediately used. Apr $10$ Paid $$35\mathrm{.}20$ for coffee and muffins for a weekly meeting with the staff. Apr $12$ Paid $$20\mathrm{.}15$ postage to courier a special order to a customer. Apr $14$ Reimbursed Susan Snow, the manager, $$60$ for travel expenses for her trip to see visit customers. Apr $28$ Paid the cleaning staff $$100$ for the month. Apr $30$ The fund had $$25\mathrm{.}60$ remaining in the petty cashbox. Sorted the petty cash receipts by accounts affected and exchanged them for a check to reimburse the fund for expenditures. Apr $30$ The petty cash fund amount is increased by $$100$ to a total of $$400.$

Some one told me $$10\mathrm{.}85$ is a mis expense for April $30.$ Can you tell me how?