This easy to install plugin expands Your shop with new Discount Requirement - "Has spent in category". It checks cart of Your client and sum up cost of products from selected categories. When sum is higher than given amount, client receive the discount. This can be really useful when, for example, You want to give 25$ discount on lamps, when clients decide to buy carpets or tables for more than 250$.
This plugin requires no configuration. To use it, simply create new Discount and pick requirement named "Has spent in category". In requirement settings box, select categories which should be summed up and amount which should be met to apply a discount. You can select as many categories as You want.