*Some times there are translate as وجود دارد so it would be
شش كتاب و هشت دفتر اينجا وجود دارد
*The other way is to use هست for there are so it would be شش كتاب و هشت دفتر اينجا هست
** note :
هست و وجود دارد here is singular as you can see our subjects are plural , we use this way because our subjects are things not person
for instance for this sentence : there are 5 people here : پنج تا آدم اينجا هستند