Final answer:
After applying a 10% discount and an additional $20 off to the original price of $179.99 for the Holy Stone drone, the final price for the first 100 customers at PC Richard and Son would be $141.99.
Step-by-step explanation:
We have an original price of a Holy Stone drone with live video and an adjustable wide-angle camera at $179.99. PC Richard and Son are offering a discount on this drone.
To calculate the final price after the discount, we first apply a 10% discount to the original price.
10% of $179.99 equals $17.999 (or $18 when rounded).
Subtracting the 10% discount from the original price, we get:
$179.99 - $18 = $161.99.
Now, PC Richard and Son offer an additional $20 off for the first 100 customers.
So we subtract $20 from the already discounted price:
$161.99 - $20 = $141.99.
Therefore, if you are one of the first 100 customers, you can purchase the Holy Stone drone for $141.99 at PC Richard and Son.