Suppose that Amanda spends all of her income on blueberries and broccoli (she has just learned that it is the perfect diet for her brain). She can just afford 12 packs of blueberries and 6 broccolis per week. She could also use her entire income to purchase 8 packs of blueberries and 14 broccolis per week. The price of one broccoli is CZK 30. Calculate the price of one blueberries pack. Please, insert numerical value only.