Buy two and get third one free.

• In the price-setting tab, Select the Fee/Discount By to Quantity
• Now add a quantity range as like the screenshot

• On the Final Equation field, please enter one of following equations

If you want to apply discount on least expensive three products,

-{priceAscByNoOfBlock}

If you want to apply discount average price of the products,

-({subTotalAsPerProductRule}/{quantityAsPerProductRule}) * {noOfBlock}

If you want to apply a discount equal to the lowest product price,

-{lowest} * {noOfBlock}

That’s all

Buy two at a fixed cost of $100

• In the price-setting tab, Select the Fee/Discount By to Quantity
• Now add a quantity range as follows as like the screenshot

• On the Final Equation field, please enter following equation

{noOfBlock} * 100 – {blockPriceAsc}

That’s all