Thanks, I am so lost in trying to use this. I don't understand any of this.
let me try to explain it a little.
each time you receive a payment in a transaction you receive a transaction output that can be called a "coin". when you spend bitcoin, you are spending one or more of these coins by putting them in your new transaction and setting a new destination.
but like in real world when you want to pay $9.99 and have a $10 bill you are left with some change. that change is also a new transaction output (aka coin) in bitcoin.
lets say you have received 2 payments so far. so you have 2 coins and lets say they are worth 1500 and 2000. if you pay someone else by only using the first coin and pay 1000 + 250 fee you will end up with 250 satoshi change which goes into a new output and since that is too small, majority of nodes reject it as "dust". it would be a little like paying $9.999 and wanting to receive $0.001.
so your choice is either pay a slightly higher fee (not receive your change) or put more coins in to increase that change amount to be bigger than dust. in the example above you can add the other coin and basically enter 3500 and pay 1000 + 270(fee) + 2230(change).
fee goes up a little but you get your dust out and consolidate your outputs.