X <-> S 3 99 SM ON/C X <-> S 3 X <= M - 100 GOTO 2 GOTO -9 GOTO 7 X <-> S 3 + 60 = GOTO -8 + X <-> S 3 RCL 6 - RCL 3 STO 6 = / 720 +/- = 1 / X