Radar Company sells bikes for $$540$ each. The company currently sells $4,050$ bikes per year and could make as many as $4,420$ bikes per year. The bikes cost $$260$ each to make: $$175$ in variable costs per bike and $$85$ of fixed costs per bike. Radar receives an offer from a potential customer who wants to buy $370$ bikes for $$500$ each. Incremental fixed costs to make this order are $$70$ per bike. No other costs will change if this order is accepted.$($a$)$ Compute the income for the special offer.$($b$)$ Should Radar accept this offer?