$***$ Symphony Electronics produces wireless speakers for outdoor use on patios, decks, etc. Their most popular model is the All Weather and requires four separate XL$12$ components per unit. The company is now planning raw material needs for the second quarter. Sales of the All Weather are the highest in the second quarter of each year as customers prepare for the summer season. The company has the following inventory requirements: The finished goods inventory on hand at the end of each month must be equal to $16,600$ units plus $10$