How many words are there in the English voice prompts set?

[greychain]

I am looking to find out how much it will cost to create a professional Khmer voice prompt set and need to know roughly how many words I will need translated

Not such an easy thing when "Welcome to 3CX, how may I help you" translates to
សូមស្វាគមន៍មកកាន់ 3CX តើខ្ញុំអាចជួយអ្នកយ៉ាងដូចម្តេច

How many words is that in Khmer?