A bicycle shop sells two types of bicycles: high-quality and medium-quality. The high-quality bicycle sells for $1,000 and its variable costs are $600. The medium-quality bicycle sells for $600 and its variable costs are $300. The shop's fixed costs are $148, 500. The high-quality bicycles are 70% of the total sales. The medium-quality bicycles represent 30% of the total sales. How many of each type of bicycle does the shop need to sell to break even? (This is a sales mix breakeven problem.)