问题详情

I went into a furniture shop in order to buy a picture. The salesman told me--"The picture is five times the cost of that ashtray, the chair is 30 times the cost of the ashtray, the table is 4 times the cost of the chair, you can buy the lot for ￡312." What was the price of the picture？
A．￡5.
B．￡10.
C．￡15.
D．￡20.此题为多项选择题。请帮忙给出正确答案和分析，谢谢！