PLEASE HELP ME :The table below shows the prices of 8 different treadmills at a sporting goods store. This week the store is having a 10% off sale on all treadmills. What are the mean, median, mode, and range of the discounted prices?
$640
$810
$810
$1175
$755
$1080
$900
$530

A mean: $837.50; median: $810: mode: $810; range: $645

B. mean: $753.75, median: $729; mode: $729; range: $580.50

C. mean: $801.25, median: $642.30; mode: $755; range: $212.35

D. mean: $829.13, median: $801.90; mode: $801.90; range: $638.55