Jean earns a graduated commission of 4% on her first 2,000 of sales and 8% on all sales over 2,000. Jean's sales for the past week totaled to 3,925. What was her commission for the week?

Okay. You get a 4% commission on your first $2,000 in sales, which is $80 in commission. After that, you have $1,920 left, which is 1,920 over 2,000. So you get 8% of the commission off of that amount. 1,920 * 8% (0.08) = 153.6. 80 + 153.6 = 233.6. Jean’s commission for the week is $233.60.