The selling price of an item is $660. It is marked down by 30%, but this sale price is still marked up from the cost of $420. Find the markup from cost to sale price.

$42

Step-by-step explanation:

We must calculate the value of the discount percentage, that is, 30% of 660, like this:

660 * 30% = 198

Now we must subtract that value from the sale price, like this:

660 - 198 = 462

In other words, the surcharge would be:

462 - 420 = 42

The surcharge value would be $ 42

if x decreases by 4 then y increases by 10

step-by-step explanation:

true

step-by-step explanation: