Two prices for one product

I have created a website for my cleint who is only selling one product. She has the option to purchase a single unit of the product, and then a 4-month bundle offer at a reduced price. She wants to only have one product page but both pricing options avaialble. I ahve searched through a bunch of plugins and tried the product variant option in woocommerce but it is not giving me what I need.

She wants it to show the single product price (and have the option to add quantity) and then have the 4-month bundle option as a selction as weel with that pricing. Then depending on which one is selected, the total price would change accordingly.

So for example, if the single product is $50. So a person can select one of those or add on quantity (such as 2 or 3 units). Then there is another option of a 4-month bundle which would normally be $200 but if selected it will be $170. And if that option is selcted than the total reflects that. Can this be done on one product page? Or is it better to have a product page for the single prosuct, and then another one for the bundle option?