In a certain flower shop, which stocks four types of flower there are
as many violets as carnation，and
as many tulips as violets．If there are equal numbers of roses and tulips，what percent of the flowers in the shop are carnations

单项选择题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

单项选择题A store currently charges the same price for each towel that it sells. If the current price of each towel were to be increased by $1,10 fewer of the towels could be bought for $120, excluding sales tax. What is the current price of each towel ？（）

A．$1
B．$2
C．$3
D．$4
E．$12