=if((G8*0.2>=20000),20000,G8*0.2)
=if(g8*20%≥20000,20000,g8*20%)
=if(G11>20000,20000,G8*20%)
=IF(OR(G8*20%>20000),"20000",G8)
=if(g11>20000,20000,g11)