you'll have to explain more what you are doing.
It is because you are taking 3.5% of the additional $3.65 also, so you have to take into account for that too.
$3.50 for CC charge
$.15 for swipe on manual
$.13 for the CC charge on the $3.50
so take your total you want to net. Times it by 1.0363 and add $.15. Your net after fees should be what you want.
Example
If manually entering a $100 sale
use 3.63% + $.15
100*1.0363=103.63
103.63+.15=103.78
charge 103.78 and your fee from square will be $3.63 + $.15 netting $100
