Answer: Final price would be $80.64.
Explanation:
Since we have given that
Coupon off = 20%
Off on everything = 20%
Save = 10%
So, Effective rate would be
![1-[(1-0.2)* (1-0.2)* (1-0.1)]\\\\=1-[0.8* 0.8* 0.9]\\\\=1-0.576\\\\=0.424](https://img.qammunity.org/2020/formulas/mathematics/college/cgsdboia95g4n1hxy5l5wfptqdanxnbq31.png)
Amount he pay before for the gift = $140
So, Amount of saving is given by

So, Final price would be

Hence, final price would be $80.64.