Issue description
I currently am near end game developing asteroid boosters and borrowed just over 1000 stage 3 construction parts , its expecting me to pay back 8560.
Is this not extreme , I cant build anything for 7 more years(10 year loan) and barely make enough so I can make payments every 3 months.(214per 3monthsx10years=8560
If I had known this i wouldnt have borrowed if I knew that, not a math wiz but 18%(10 for loan and 8 interest) does not add up to over 8000.
Please explain I have alot of hours on this map and am discouraged.
Reproduction steps

Game version and build number
v0.7.9 b495
Operating system
Windows