Answer:
![\$843.67](https://img.qammunity.org/2022/formulas/mathematics/high-school/vf2uzmytb74jy2w2m8sefakkn2m7rp2vea.png)
Explanation:
Let's break the price changes down:
Initial price: $896
On sale for 12%, meaning the computer will be 100-12=88% of the original price:
New sale price
![\implies896\cdot 0.88=\$788.48](https://img.qammunity.org/2022/formulas/mathematics/high-school/y6pvg653g9i2jcj0nchsurmx4pit870qpf.png)
Now a 7% tax is added to this, meaning the final price will be 107% of this new sale price.
Final price
![\implies 788.48\cdot 1.07\approx \boxed{\$843.67}](https://img.qammunity.org/2022/formulas/mathematics/high-school/lickvmantx4cn8lidjn7qlleg98f3zzvpa.png)