Holding period and annual investment) returns. Bohenick Classic Automobiles restores and rebuilds old classic cars. annual return on this investment? The company purchased and restored a classic 1957 Thunderbird convertible 4 years ago for $8,000.00. Today at auction, the car sold for $48,000.00. What are the holding period return and the What is the holding period return of the car? % (Round to two decimal places.)