1. **State the problem:** Pamela Mello earns a commission of 2.6% on the first 70000 and 3.4% on any sales above 70000. Her weekly sales are 86800. We need to find her total commission. 2. **Formula and rules:** Total commission = commission on first 70000 + commission on amount over 70000. 3. **Calculate commission on first 70000:** $$70000 \times 0.026 = 1820$$ 4. **Calculate amount over 70000:** $$86800 - 70000 = 16800$$ 5. **Calculate commission on amount over 70000:** $$16800 \times 0.034 = 571.2$$ 6. **Calculate total commission:** $$1820 + 571.2 = 2391.2$$ 7. **Answer:** Pamela's total commission is $2391.2.