新东方蓝皮书151 求解

Manager: accounting and billing are located right next to each other and the two departments do similar kinds of work; yet expenditures for clerical supplies charged to Billing are much higher ,Is Billing wasting supplies?

Head of Billing;  not alt all

which of the following ,if true ,best supports the position of the Head of Billing

(E)  Members of accounting found the clerical supplies cabinet of Billing more convenient to go to for supplies than their own departments'cabinet.

cabinet在这里 是什么意思？ 不理解~`