According to a recent article on Huffington Post, the data from the Bureau of Labor Statistics shows that college textbook prices increased by 812% between 1978 and 2013. That's on average 6.7174% per year, faster than tuition and fees, and inflation!

And so, assuming 6.7174% annual increase in textbook prices, a textbook that you can buy today (year 2019) for $190 must have cost only $_____ in 1969!

(Do NOT use "$" in your answer. Round your answer to TWO decimal place, for example, 1,000.23)