1. **State the problem:** Calculate the value of the expression $2491.67 - 711.67(1) - 1511.67(0) + 326.67(0)$. 2. **Apply multiplication:** Multiply each number inside the parentheses by the number outside. Since multiplying by 0 results in 0, and multiplying by 1 results in the number itself, we have: $$2491.67 - 711.67 \times 1 - 1511.67 \times 0 + 326.67 \times 0 = 2491.67 - 711.67 - 0 + 0$$ 3. **Simplify the expression:** $$2491.67 - 711.67 = 1780$$ 4. **Final answer:** $$\boxed{1780}$$