Could sure use help filling out form 6252

2024 land sale - price 210K, 50K down payment, seller (me) financed 160K over next 5 years.

Land cost basis 27K,  closing costs (commissions etc.) 21K

Have rec'd 2 monthly installment for 2024, totaling $1599 interest and $319 capital gain.

 

Image shows numbers entered excluding cost basis and closing costs - works but I'm guessing not acceptable?  How does one properly represent the 50K down payment on form 6252?  right now it's listed as contract price.

form 6252 RDS_Page_1.jpg