Well the Regular Price is the price before the sale was added. So here's the work that I would put in and in the end, just divide by (1 - 0.38).
Price x (1 - 0.38) = Sale Price (529)
Price x 0.62 = 529
Price = 529 / 0.62 = 853.23
$853.23 was the Regular Price
100m runner (don’t mind this i need it to be 20 characters long)
A a heightened self consciousness
smell is the sense not relayed through the thalamus