Juan raised the price of a certain brand of running shorts in his store from $30 to $35. Once he did this, Juan noticed that customers were purchasing fewer shirts to go with the shorts. Last week, he sold 40 shirts, which decreased to 20 after the price increase with the shorts. Using the mid-point formula, the cross-price elasticity is __________ and the goods are __________.

• a.)
• b.)
• c.)
• d.)

1.04; substitutes

0.05; substitutes

-0.23; complements

-4.33; complements