Two sources of income from sales for pizzerias include:
Pizzerias as the term implies, are places that make and sell pizzas. This means that their chief source of income from sales would be the sale of pizzas. They also make sales of other pastries such as calzones and bread on occasion.
Pizzerias also sell drinks and liquid refreshments for customers to consume when eating the pizzas so this is another source of income from sales for pizzerias.
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