Astro Industries of Minneapolis, Minnesota, makes weekly shipments to $25$ customers in the Dallas area. Each customer's order weighs, on average, $2,500$ pounds. A direct truck shipment from Minneapolis to Dallas costs $$1,500.$ The maximum load per truck is $45,000$ pounds. a$.$ The total cost for Astro to make direct, single$-$order shipments to all of its customers is $ per week. $($Enter your response as a whole number.$)$