The spelling of the word "AMPINC" can be explained through its International Phonetic Alphabet (IPA) transcription. The first sound is /æ/ as in "cat", followed by the consonant cluster /mp/ as in "jump". The third sound is /ɪ/ as in "sit", and the fourth sound is /ŋ/ as in "sing". The final two sounds are the consonant cluster /k/ and the vowel /ə/ as in "book". Therefore, the spelling of "AMPINC" accurately represents its pronunciation in IPA transcription.