Changing a price to POA if price is 0.00

[PaulBNUFC]

Tried having a look at other solutions on here but couldn't find the section which says "price.liquid"
Basically want to have POA on when the price is set to 0
theme I'm using is "Warehouse version 1.18.3" 

Thanks! 

[namphan]

Hi @PaulBNUFC,

Please send me the code of main-product.liquid file, I will check it for you