1999 rodeo

my rodeo didnt pass emmision i was told to replace the cat and the o2 sensor plus the egr and the map sensor

my rodeo is a v6 99

the readings on the emmsions were

hc gpm 6.1948 limits 1.2000
co gpm 21.09243 limits 15.0000
nox gpm 4.1717 limits 2.0000

could anybody help me thank
or should i junk it i ready spent about 600.00 or is it fix it able
thank u