Andreas needs to purchase cloth to make pants. He needs $1,400$ yards of cloth per week on average. The supplier charges a $$100$ delivery fee per order $($which is independent of the order size$)$ and $$5$ per each yard of cloth. Andreas' annual holding cost is $15\%.$ Assume $52$ weeks per year and $7$ days per week. If Andreas wants to minimize inventory holding and ordering costs, the amount of cloth he should purchase with each order $($in yards$)$ is