Kristen faithfully put $100 a week into an investment account for the next 10 years. She then decided to start a family and be a stay-at-home mom, so she could no longer afford her $100 weekly investment. If Kristen didn't spend any of her investment, how much did she accumulate over the next twenty years (total of 30 years) if she continued to earn 7% interest (lump sum investment)