Nissan

I bought a new 07 nissan sentra, a week ago, i liked the car and im happy with it but my question is well at the time i bought it i could affod payments of 350 a month, but i got a salary raise at my job and i wanted to solstice by pontiac, what do i do, can i trade in my sentra even if i havent made a payment or can i return it! ! help me out but even if i go an return it at the nissan i still have to go to pontiac dealer and get the solstice i had a miata and i still love 2 seaters

You will find that you will lose money as the nissan became a 2nd hand vehicle as soon as you drove it out of the saleyard.dealers need to make money on trade ins so you will need to find a lump to make up the difference between trade-in and new solstice price.