I need help. Thank you

Wildhorse Inc. operates a lumber yard. Wildhorse purchases the raw materials for $52500 and incurs additional processing costs of $36600 to obtain three observable joint products. Further processing and final sales values for the products are as follows: What is the amount of joint costs assigned to the 25ft board using the net realizable value (NRV) method? $26290.$28526.$42100.$22224