Multiply the cost of one notebook by 3000.<br><br>
&bull; 3000 × 0.65<br>
&bull; 3 × 65 = 195, then put back three zeros: 195,000<br>
&bull; With two decimal places: 1950.00<br>
&bull; Or: 3000 × 0.65 = 3000 × \( \frac{65}{100} \) = 30 × 65 = 1950<br>
<br>
Final Answer: 1950