Modify woocommerce plugin

woocommerce print invoice modify

need items in array rather than separate

eg:

Breakfast
, Make Your Own (+£0.00): 2 Eggs, Make Your Own (+£0.00): Sausage, Make Your Own (+£0.00): Beans, Make Your Own (+£0.00): Fried Tomatoes, Make Your Own (+£0.00): 2 Hash Browns, Make Your Own (+£0.00): Mushrooms,
Add Extras (+£0.00):
No Extras, Toast or Bread (+£0.00): Bread, Drink (+£0.00): Coffee, Sugar / Sweetener (+£0.00): 1 Sugar

then the titles are in bold but want the values in bold

eg: 2 Eggs, Sausage, Beans etc

files need to be put in to theme folder so when plugin updates it doesnt override
i will need to test with printing once all updated and before project is finalised