How much VS How many....
"How much" is for uncountable nouns.
"How many" is for countable nouns.
How much is the phone? 5,000 baht
How many phones do you have? I have two phones.
How much is the sugar? It is 20 baht.
How much sugar is in the pack? 100 grams
How many packs are in one box? 200 packs.