Answer:
After the coupon and sales tax were applied, he paid $15.27 for the shirt.
Step-by-step explanation:
We are given that a shirt is $16.95. This is reduced by 15% due to the coupon.

Therefore, 85% of the shirt price is still active.

We can multiply this value by the shirt price to find the current price.

However, the shirt also has a sales tax of 6% applied after the coupon.
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Now, we need to find the total price for the shirt.

Therefore, he paid $15.27 for the shirt.