For this case, we must indicate what was the final cost of the items since the TV has a 20% discount. So, we make a rule of three to determine the discount amount.
545 ---------------> 100%
x -------------------> 20%
Where "x" represents the amount given by the 20% discount.
![x = \frac {20 * 545} {100}\\x = 109\](https://img.qammunity.org/2020/formulas/mathematics/middle-school/vkgfqvx3oagthzj8osn53s3z9b9piplmmr.png)
So, on TV you save $ 109.
![545-109 = 436\](https://img.qammunity.org/2020/formulas/mathematics/middle-school/jmrdmoxofx34z5oj1gf9sj6rt0is8bs95o.png)
Payment for TV $ 436
Then the total cost of the two items, excluding taxes, was:
![185 + 436 = 625\](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ns2s0gsqn4zt723f5zywz5573wvuczm0tb.png)
Answer:
$ 625