To run his grocery store, Mr. Haj needs $4000 a day. This money is used to pay for orders done, delivery costs and employees' salaries. If he spends 2/5 of the total operation costs on employees' salary and 1/4 of the remaining amount on delivery costs, how much money does he pay for the orders done?
The total amount of money Mr. Haj used to pay for employee salary is 2/5*$4000 = $<<2/5*4000=1600>>1600
After paying the employee salaries, Mr. Haj remains with $4000-$1600 = $<<4000-1600=2400>>2400
He also uses 1/4*$2400= $<<2400/4=600>>600 on delivery costs.
The remaining amount of money that he uses to pay for orders is $2400-$600 = $<<2400-600=1800>>1800
#### 1800