Question regarding Inventory Items and quantities

Thanks for visiting the Community today, @billhdz. I've got two options for you to handle your inventory items in your QuickBooks Desktop (QBDT) for Mac program.

The first option you can utilize is what you've mentioned above. You can set up a parent item for POSTER_SALES and make POSTER_SALES_WHOLESALE and POSTER_SALES_RETAIL inventory items as a subitem of POSTER_SALES. Here's how:

1. Create a parent item named POSTER_SALES. If you won’t be using the parent item on invoices and sales forms, leave the rate or price of the parent item at zero. 
2. For the subitem, add a new item or edit an existing one.
3. Select the Subitem of check box and choose the name of the parent item. 
4. Be sure the Type of the subitem is the same as the parent item.
5. Click OK.

Another option you can use is to create a group item. 

1. Choose Lists > Items. Click the + menu at the bottom of the list and click New Item. 
2. In the Type field of the New Item window, choose Group. 
3. In the Group Name/Number field, enter a name or number for the group item. 
4. In the Item column, select the items that you want to include in this group.
5. In the Qty column, enter the quantity you want QuickBooks to enter for each individual item when you use the group item on a form. If you do not enter quantities, QuickBooks assumes that the quantity of each item is 1.

Please keep in mind that if you change the quantity for the entire group, QuickBooks automatically adjusts the quantities of the individual items and recalculates the amount for each item. If you change the quantity of an individual item, the quantities and amounts of the other items remain unchanged.

Additionally, here's an article that answers the most frequently asked questions about managing your items: Add, edit, and delete items.

Please don't hesitate to add details below if there is anything else I can do for you. I'll be there to help. Stay safe and enjoy your day.

Thank you for getting back to us, @billhdz.

You can set up your adjustment account, you can adjust a product’s quantity, value, or both. 

To adjust your inventory: 

1. Go to the Vendors menu and select Adjust Qty/Value on Hand.
2. Enter the name of the expense account where you track inventory loss and shortages. If you need to assign the expense to more than one account, enter a separate adjustment for each account. You can enter additional adjustments by clicking Next instead of OK.
3. Enter the new quantity of each inventory item whose quantity has changed. You can also enter the new quantity by entering the difference in the Qty Difference column. To enter a difference that reduces the quantity, be sure to type a minus sign before the number (for example, -25).
4. If you need to, edit the value of the inventory after adjusting the quantity. Most businesses can accept QuickBooks’ recalculation of the value, which is based on average cost. When you edit a value, you change the average cost of the items in stock. To edit the value, select the Value Adjustment check box. In the New Value column, enter the value for each inventory item whose value you want to change.

Refer to this article for more information: Adjust your inventory quantity or value in QuickBooks Desktop. 

From here, you can run Inventory Valuation Summary report to take a look at your inventory status reports and make sure everything looks good: Customize reports in QuickBooks Desktop. 

Let me know if you need more information or help with your inventory. I'm always here to help. Have a wonderful day!