How to add a class to jade (in a loop)?

Question

css

mixin products-item(classname, ...items)
div(class='product product-item_' + classname)
each item in items
div(class='product-item__' + item)= item
+products-item('first -guitar','Nylon','140')
It is necessary to be able to add an additional class to the class when adding, but now it is the name of the element and this is not suitable, I want to set my class and I need one to be name another price
for example
+products-item(' first-guitar',{name:'class-name'},{price:class-price},'Nylon','140')