Step-by-step explanation:Asked: How much along Myrna sold last Friday? Given: 50 pieces of candies at 1.25 each ; 15 pieces of cookies at 7.00 eachOperation: multiplication and additionNumber sentence: (50 × 1.25) + (15 × 7.00)Solution: (50 × 1.25) + (15 × 7.00) 62.50 + 105 = 167.50Answer: Along Mayra sold 167.50 worth of candies and cookies last Friday .