Final answer:
After applying an 80% discount to the $200 jacket, the sale price is $40. An additional 8% sales tax adds $3.20, making the total cost $43.20 to give to the cashier.
Step-by-step explanation:
To find the amount of money you need to give the cashier to buy a jacket, you need to calculate the sales price and add the sales tax. First, find the sales price by applying the discount of 80% to the original price of $200. 80% of $200 is $160.
Next, calculate the sales tax by multiplying the sales price by 8% (or 0.08). 8% of $160 is $12.80.
Finally, add the sales price and the sales tax together. $160 + $12.80 = $172.80. Therefore, you will need to give the cashier $172.80 to buy the jacket.
The regular price of a jacket is $200, and it is on sale at an 80% discount. To determine the sale price, you multiply the original price by (100% - discount rate) or in this case, 20% (100% - 80%). Therefore, the sale price is $200 × 0.20, which equals $40. Next, to calculate the sales tax, convert the tax rate of 8% to a decimal (0.08) and multiply by the sale price ($40 × 0.08). This gives you $3.20. To find the total cost, add the sales tax to the sale price of the jacket ($40 + $3.20), which equals $43.20. The amount of money you will have to give the cashier to buy the jacket, including sales tax, is therefore $43.20.