How to calculate total by relational fields?

• osvaldo.moraa

• October 30, 2019 at 3:39 am

Hi, I’m making an accounting system with CPT and ACF Pro, I have a post called account balance, and two post types called sales and purchases, this post types have a relational field object post to select which account is linked to the movement. So, I want to calculate the total of the sales, the total of purchases and the result of this two will be used to calculate the current account balance. How can I do that? Could someone help me, I’m a bit lost.