Variable not outputting correctly

Good morning all, hopefully someone can help me with this. New to voiceflow and loving it so far.

I have a variable {usd_price} which receives a value 0.00175111 as shown in attached.

I want Alexa to read this value out. I have entered:

The price of Dexit is {usd_price} Dollars

but for some reason the price always shows as 0.00