Supermarket Pricing Requirements.md

Supermarket Pricing Requirements

Simple Pricing

• A can of beans cost $0.50
• Dry Beans are $1.99 a pound

Fractional Pricing

• Dry breans are 1.99 a pound/ 8oz of dry breans - 1.00
• Cans can only be sold in positive intergers
• Pounds can be sold in fractions

Quantity Discount

• 3 Cans are $1(when each is normally $.5)
  • What happens if you buy 4 cans?
• 3 pounds are $3(when normally $1.99)

Promotional Discount

• Buy 3 units item get 1 free(what is the price of the 4th one?)
• Buy 4, you get 5

Reflection/Review

• What is the state of our design?
• Do we want to keep going?

Percentage Discount

• Discount/Sale ex: X% an item

Quantity Percentage Discount

• Buy x pounds and get x% off

Questions to consider

• does fractional money exist?

• when (if ever) does rounding take place?

• how do you keep an audit trail of pricing decisions (and do you need to)?

• if a shelf of 100 cans is priced using “buy two, get one free”, how do you value the stock?

• are costs and prices the same class of thing?

• How does UnitOfSale evolves? How does the concrete implementation evolve?

• What would the implementation of pricing floor look like?