Apple Performa 5215CD Memory

Main Memory
Maximum Memory - 64 MB
Memory Slots - 2 (2 banks of 1)

APPLE-8MB-SIMM (8MB Powermac 6100 Mac SIMM) $4.78

APPLE-16MB-4K-SIMM (16MB Apple Powermac 72-pin FPM SIMM) $4.98

M3373LL/A (32MB Apple PowerMac 72-pin FPM 5V SIMM) $9.98