This adds Packages with multiple Upgrade Parts and a 10% Discount to the Purchase Menu:
50x Common Upgrade Parts for 450$
25x Plumbing Upgrade Parts for 675$
20x Kitchen Upgrade Parts for 1.620$
20x Electronic Upgrade Parts for 2.250$
100 x Robot Salvage Parts for 450$
20 x Eco Upgrade Parts for 900$
20 x Livestock Upgrade Parts for 1.800$
(I also added the missing single Eco & Livestock Upgrade Parts to the Purchase Menu)