Does the subject want to ask, "Is it enough to buy 48 bookcases for the school reading room with 135 yuan and prepare 7,000 yuan for each bookcase?" That's enough.

The school reading room is going to buy 48 bookcases, each bookcase 135 yuan, and 48 times 135 equals 6480 yuan. Since 6480 yuan is less than 7000 yuan, the school reading room is going to buy 48 bookcases, and each bookcase 135 yuan is going to buy 7000 yuan.