Given:
A swimsuit that originally cost $70 before any discount is on sale 20% off
Then 20% of that mean price is 80% of the price:

Originally price 70$ then:

After 20% off the price is 56.
The swimsuit is then put on clearance for additional 40% off the sale price and the sale price is 56.
40% of that mean price is 60% so:

So price is 60% of the 56.

So price is 33.6