How much will it cost to replace my car fuse box

I'm not sure if the battery is backwards. But before we took the old battery out I didn't power off the radio ,just turned off the ignition . And now when the new battery is in the radio and lights inside the car won't come on

test ALL the fuses with a test light

whats the approximate on how much it will cost to go to a dealership

you don't want to know.just get a test light and check all the fuses.you can test them all in less than 5 minutes with a cheap test light. where did it spark at? what sparked? will the car start and run?

When the battery was cocked into place , there was a spark like when you plug in a iron and there's a spark that goes off when you plug I in that happen. The car starts and run m it's not the starter . It's my radio won't come on

i think one or more fuses are blown!all you have to do is test them,and you will find it or them.

Thank you for your help

you're welcome