Every item in the just a dollar store is priced $ 1.00 $1.00. when jack opens the store, there is $ 200.00 $200.00 in the cash register. when he counts the money in the cash register at the end of the day, the total is $ 963.00 $963.00. if the sales tax rate is 9 % 9%, how many items were sold that day?

The school cafeteria can make pizza for approximately $0.30 a slice. the cost of kitchen use and cafeteria staff runs about $200 per day. the pizza den nearby will deliver whole pizzas for $9.00 each. the cafeteria staff cuts the pizza into eight slices and serves them in the usual cafeteria line. with no cooking duties, the staff can be reduced by half, for a fixed cost of $75 per day. should the school cafeteria make or buy its pizzas?