The Morgan styling salon sells it’s private label styling gel for $19.98 after a markup of 160% based on the cost fine the cost and markup

19.98 = x + x(1.6)
19.98 = 1.6x + x
19.98 = 2.6x
x = 7.68
x(1.6) = 12.29
The cost is $7.68 and the markup is $12.29. (Approximate due to rounding)
Hope this helps!! :)