All migration tools share the same price regarding the Entity Limit option. Entity Limit is calculated based on the highest entity number among the count of products, orders, customers and blog posts. E.g. you want to migrate 1000 products, 900 customers, 800 orders and other related data, your highest entity number would be 1000, giving you an option of 1000 Entity Limit to select from. Learn more about it at How To Use Next-Cart Service.
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Your highest entity number is 100 and you should choose 100 Entity Limit option.