The three primary pricing methods that firms use to develop their pricing strategy are:

1. Cost-based Pricing: In this method, prices are set by adding a profit margin to the cost of producing or acquiring a product. It ensures that all costs are covered and each sale makes a profit but does not consider the value perceived by customers or the prices set by competitors. It is often used in industries with standardized products.
2. Value-based Pricing: Here, the price is set based on the perceived value of the product or service to the customer rather than the cost of production. This method requires a deep understanding of customers' needs, preferences, and willingness to pay. It is often used for unique, innovative, or high-quality products that offer significant value to customers.
3. Competition-based Pricing: This method involves setting prices based on competitors' charges. Depending on their market positioning and strategy, firms may price their products lower, higher, or at par with competitors. This method is commonly used in highly competitive markets with similar product offerings.

Effective pricing strategies often involve a mix of these methods.

The choice of pricing method depends on the firm's objectives, market conditions, product characteristics, and customer preferences.