Show me the steps to solve Why doesn$$t Walmart use MDF$?$

The Robinson$-$Patman act doesn$$t apply to Walmart because it is a monopoly, so it doesn$$t need MDF$.$

Walmart eats the cost of lower prices so people keep coming back, ensuring an eventual gain over a temporary loss.

Walmart pressures brands into lower prices using its size as the largest national retailer.

Walmart does use MDF but on the back end rather than through marketing.