ช่วยหาคำตอบและอธิบายหน่อยได้ไหมค้ะ ไม่เข้าใจโจทย์ข้อนี้เลย

Ms.jones deposited $100 at the end of each month for 10 year into a saving account earning 6% compounded monthly. However, she deposited an additional $1000 at the end of the seventh year. How much did she have at the end of the tenth year?