variable product default price

Hi There,

Variable Product – Current situation:
by default before choosing any variable the price is on range.

Example:
“10$-40$”

Than after choosing some variable it display the variable price: “20$”.

Now, i need that on the default price on shop/single page
it will display numbers+letters

Example:
“3.3$ for 100g”
and than after choosing variable it will change for the spesific price of the chosing variable.

Thanks