Plugin for grocery delivery scheme – local farm?

Hi there,
I’ve been asked to help a local farm put a site together to oversee their organic food box delivery scheme. I am wondering if there is a cart that might be suited or easily customisable for grocery delivery? They run a set box scheme, but want people to be able to add or subtract from the standard boxes and auto collate the results into a snapshot delivery list. Also for the cart to take a subscription payment with the ability to opt out for a week.If anyone has faced a similar challenge, I’d love to hear your thoughts.