6. [-76 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Suppose a certain hardware store has been in business for a few years and is doing well. The owner has decided to save for a future expansion to a second location. He invests $3,000 at the end of every month at 12% interest compounded monthly. (Round your answers to the nearest cent.) (a) How much (in $) will be available for the second store after years? $ (b) How much (in $) would be in the account if the owner saved for 7 years? $