You can break it down pretty easily.
PGY1 year you had no income the previous year as a MS4 so your income based repayment should be $0.
PGY2 year you only received about 6 months of your resident salary (July 1st - Dec 31st), so your income should be ~$30k. Minus 150% of federal poverty level ($22k) gives you a discretionary income of $8k. 10% of that is your payment. Which is $800.
PGY3 year is the first year you make full payments. Your income should be $60k. Payments should be $60k-$22k = $38k * 10% = $3,800.
PGY4 year should be the same calculation. Maybe a bit more with annual pay increase. $4,000.
PGY5 fellowship year, same thing, slight pay bump so $4,200.
First attending year, same thing since you're still going off your fellowship salary. So again about $4,600.
That's 6 years of PSLF payments already. You've paid ~$17.4k.
Now your second attending year you start making significant payments. If you have a salary of $280k which seems to be the median for general neurology. Your payment should be $280k-$22k = $258k * 10% = $25.8k
So to finish out PSLF you need 4 more years of payments at $25.8k or another $100k or so.
So basically if your total loans are > $100k and your salary without compensation is at or under $280k a year, PSLF will save you money.
In this scenario your repayment is the same regardless of if you took out $100k in loans or $500k