Holding period and annual (investment) returns. Bohenick Classic Automobiles The company purchased and restored a classic 1957 Thunderbird convertible 6 years ago for $8,800.00. Today at auction, the car sold for $79,200.00. What are the holding period return and the annual return on this investment? restores and rebuilds old classic cars What is the holding period return of the car? D+ (Round to two decimal places.)