SPITE and GOT PEN? (lol)

Size of market (# of consumers)

Price of related goods (substitutes/complements)

Income (normal/inferior goods)

Tastes and preferences

Expectations (in the future)

Government action (taxes/subsidies)

Opportunity cost of alternative production

Technology

Prices/availability of inputs (resources: ANY cost to the business)

Expectations of future profit

Number of sellers

?