(b) The annual cost is calculated by dividing the annual administration cost by the number of project management officer-months actually worked and multiplying the result by the number of months spent on each project per year;
（b） 每年费用的计算方法是，用年度管理费用除以项目管理干事实际工作的月数，再乘以每个项目每年所花时间的月数；