You can achieve this with the help of third-party apps available on the Shopify App Store. Here are some options:
VolumeBoost – Volume Discount: This app allows you to set up discounted pricing campaigns for your product pages, enabling bulk discount campaigns with various discount types. You can manage and limit bulk discount offers based on quantity.
Vivid Discounts Manager PRO: Offers the ability to create multiple types of discounts with ease. You can define the rules for your discounts, such as total spent, cart value, items number, or specific products, and the app will automatically apply these discounts.
Kaching Bundle Quantity Breaks focuses specifically on offering discounts based on the quantity purchased for individual items. This aligns perfectly with your requirement of providing a 5% discount for the first 100 pieces of an item.
I’m sorry to hear that the apps didn’t match your needs, but I’m glad the information was helpful. If there’s anything more specific you’re looking for or if you have additional requirements, feel free to share, and I’ll do my best to assist further.
give a discount by percentage off, a dollar amount off, or a fixed price
apply sales at a variant, collection, or store level, or to hand-picked products only
set up a sale in seconds storewide
You can review other apps that offer needed functionality at the app store, and if nothing meets your needs, there is always an option to develop a custom solution.