The regular price of each pair of pants is $45, and Jean needs to buy 10 pairs, so the total cost before the discount is $45 * 10 = $450.
There is a 20% discount on the pants, which means Jean will pay only 100% - 20% = 80% of the original price.
To calculate the price after the discount, we multiply the original price by 80%, so $450 * 0.8 = $360.
Now we need to add a 10% tax to the discounted price. To calculate the tax amount, we multiply the discounted price by 10%, so $360 * 0.1 = $36.
Finally, we add the tax amount to the discounted price to find the total amount Jean will have to pay, which is $360 + $36 = $396.
#### 396
The answer is: 396
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
If Jean needs to purchase 10 new pairs of pants that are normally priced at $45 each, and there is a 20% discount on the pants, how much will she have to pay for all of them after including a 10% tax?

### Answer:
