The law and of demand means that the you must keep up with the consumer.
2.What is supply ?
Supply means tha you must keep up with inventory. So they dont rum out of stock.
3.What is market price ?
Market price means that is the prices that the product is and wont be higher than. So that if something is on sale it is lower than it maket price.
4.What is equilibrium ?
Equilibrum means that the average prices sale is average.