BP rental calculator showing too incorrect cash needed...

[Michael Litle]

I put in a negative amount to represent seller credit to closing and wonder if that's why.

The purchase is $434,500 and I need 10% down + about $12,500 in closing (without the $15k closing credit) and estimating $23,500 for rehab budget.

The calculator says I need $72k cash to close even when I have a line item of -$15,000 closing credit.  The closing costs do update to -$2500, but the deal summary doesn't seem to understand the negative.