The price of widgets has decreased from $5 to $4, causing the quantity demanded to increase from 300 to 400 units. Use the midpoint method to calculate the price elasticity of demand. Round to two decimal places and use absolute values.

and

If a family spends its entire budget in a given time frame, the family can afford either 10 restaurant meals or 30 home meals. Assuming the family spends its entire budget on just these two goods, what is the opportunity cost of one extra restaurant meal in the time frame? (Round your answer to two decimal places.)