Fees for OFE were 7% one time, initial fee + 0,045% every year.
Time to retirement is 40 years initially, going down to zero, so it averages 20 years for any given amount of money invested.
USA 401k retirement fees according to the "401k Averages Book" are small initially, but then every year you pay between 0,3% and 1,8%. The OFE fee is roughtly equivalent to a every year 0,5% fee over 20 years.
Value in 20 years = After Fee*((1+5% per year return - Yearly Fee)^Years)
|Initial||Initial Fee||After Fee||Yearly Fee||Value in 20 years, at 5% per year||Amount of fees|
The actual OFE results should be a little worse than this table since you can imagine you will earn more in your second half of your live than in your first one, but I don't think it would be such a dramatic difference.
One time fees can be converted into repetitive fees.