Eat meter/Burn meter

Can someone explain the eat/burn meter thing to me?  The two numbers there confuse me.  So, I think it is my amount for the day is at the top and I am assuming, where I currently am in the day is the bottom number and as I understand it, there should be a gap of 500-800 per day between the in and out (the top numbers)?  Less in than out.  Is that right?

Never mind, I found it in help!