Answer:
$400
Explanation:
Hi we have to use the Rule of the Three
The price that we paid represents the 80% of the original prize
Hence we have that
$320⇒80% (.8)
$x⇒100%(.1)
As we know we have to multiply diagonally and divide with the one in the corner
So we have (320)*(1 )=320 and then divide

Hence the original price was $400