I need the solution and the answer of this question. I am in a hurry, so quick response will be appreciated. Thank you!

Julia Merryweather owns the general store in Youbou. She is a monthly filer for PST purposes. In February of this year, she had sales of $77,000. She calculated that 15% of these sales were correctly not charged PST. Calculated the amount that Julia is required to remit for PST purposes. Enter your answer in whole numbers, do not use dollar signs or commas