This cache will not be found at the posted coordinates. But the correct coordinates are easy to get. All you have to do is run the following program:
05 GOSUB 3000
10 ? CHR$(N0RTH)
15 GOSUB 10000
20 GOTO 4000
30 FOR I = 1 TO BATMAN
50 READ A,B,C
51 REM ? I,A,B,GEO,CACHE
52 REM ?A,B,GEO,CACHE
53 IF C=JOKER - 5 THEN GOTO 666
54 IF C=JOKER THEN GOTO 3500
55 IF A = B THEN GOSUB 1000
60 IF B <> A THEN GOSUB 2000
80 NEXT I
90 END
666 POKE CACHE + I + GEO,(B-A) * C / C
668 GOTO 80
1000 POKE GEO + CACHE + I,A+B
1010 RETURN
2000 POKE M0N + CACHE + I,B
2010 RETURN
3000 GOTO 10000
3005 GEO = KILROY * KILROY
3010 CACHE = (JOKER*WEST)-KILROY-2
3020 RETURN
3500 I=I-1
3510 GOTO 80
3520 RETURN
3800 YORLIK=32
3810 GOTO 10010
4000 DATA 54,328,8,7,7,2,102,134,3,103,52,1,104,57,1,34,55,8,105,32,2
4005 DATA 105,158,3,104,54,2,108,46,1,109,57,1,0,34,8,110,51,2,111,164,3
4010 DATA 200,56,8,201,233,3,202,23,2,203,23,8,203,32,2,204,57,1,205,260,3,199,52,8
4020 DATA 205,237,3,207,49,2,212,260,3,98,56,8,209,46,2,210,260,3,26,53,2,25,25,2
4025 GOTO 30
4050 DATA 7,7,2,102,134,3,103,52,1,104,57,1,105
4055 DATA 32,2,106,158,3,107,57,2,108,46,1,109,50,1,110,57,2,111,161,3
4060 DATA 201,233,3,202, 23,2,203, 32,2,204,57,1,205,260
4065 DATA 3,205,237,3,207,48,2,208,260,3,209,46,2,210,260,3,26,26,1,212,51,2
10000 BATMAN=(5*5)-2
10002 N0RTH=147:WEST=60:M0N=SQR(1048576)
10005 JOKER=8
10008 KILROY=32
10009 GOTO 3005
10010 RETURN