Cost and Price of a product, Producer Surplus, Supply Curve

Cost of a product
The cost that producer need to produce a product

Price of a product
The amount that producer receive for a product

Producer surplus
Producer surplus is the difference between what a producer actually receives (which will be the market price) for a product and the producer's minimum supply price (marginal cost) for that product.

Supply Curve
Producers will continue to produce units of the good as long as the selling price exceeds the cost. The marginal cost indicates is the minimum supply price that the producer is willing to supply one more unit of the good. The marginal cost above the average variable cost represents the producer’s supply curve.