Vuvuzelas

To get into the World Cup spirit, I wrote four checks to purchase four vuvuzelas. They are different colored vuvuzelas : yellow, blue, red and black. Each check is for a different amount : $2, $3, $4 and $6. Each check is numbered four through seven. Hints: Check #5 isn't for $6. The check for the black vuvuzela is for more money than check #4, which in turn is for more than the check for the blue vuvuzela. The check for the yellow vuvuzela is for twice as much as check #7. The $4 check has a higher number than the check for the red vuvuzela. Question : Can you find the color, the amount paid and the check number for each vuvuzela? See answer