Consider a system where the cache memory (L1) has an access time of "C ns," and the main memory (L2) has an access time of "M ns." In this architecture, 80% of the memory accesses are read, and the remaining 20% are write requests. If the hit ratio for read operations is "H," and the hit ratio for write operations is 1, what is the average memory access time (AMAT) when a write-through protocol is implemented in the cache?