不在我国家庭财产保险承保范围之内的财产有（）。

A、票证

B、食品

C、床上用品

D、书籍

A merchant paid $300 for a shipment of x identical calculators. The merchant used 2 of the calculators as demonstrators and sold each of the others for $5 more than the average (arithmetic mean) cost of the X calculators. If the total revenue from the sale of the calculators was $120 more than the cost of the shipment, how many calculators were in the shipment ？（）

A.24

B.25

C.26

D.28

E.30