For celebration of his birthday Ram goes to purchase sweets. He needs to buy a minimum of 300 pieces ofrasgulla and 150 pieces of cream roll. Only pre-packed packets are available in the shop for these two items. These are economy pack & premium pack. Economy pack has 4 rasgulla and 1 cream roll costing ` 25/- per pack and premium pack had 10 rasgulla and 7 cream roll costing ` 75/- per packet. If he has to meet his requirement with the premium and economy packs, what is the minimum expenditure he has to incur?