From FedEX:

We will declares base on invoice declaration.
Invoice declaration:
Example 1.
Item: RM500
Shipping/Freight: RM405
We will declares as RM908.08 (RM500 + RM5(Insurance) + RM403.08(Freight) 
We will not include RM405 as invoice had breakdown the freight and item value.

Example 2.
Item: RM905
Shipping/Freight: NIL
We will declares as RM1317.13 (RM905 + RM9.05(Insurance) + RM403.08(Freight) 
If the no breakdown of freight amount, we will declares RM905 as item value add the custom approved freight.

Example 3.
Item:RM500
Shipping/Freight: NIL
We will declares as RM908.08 (RM500 + RM5(Insurance) + RM403.08(Freight) 
We will add the custom approved freight rates and item as RM500.

Printed Circuit Board – Bare Board (without component assy) – 8534.00.000 (nil&10%) – 10% Sales Tax.
Printed Circuit Board Assembly – Component Assembly Board – 8537.10.990(15%&10%- 15% Import Tax & 10% Sales Tax. 

USB Cable – 8544.42.920 (30%&10%) – 30% Import Tax & 10% Sales Tax.

Thanks
Best Regards

Senior Custom Broker (CDN)
FedEx Express, Malaysia

Just for others info. Dont declare shipping as free. US shipping at least 6kg. Below 6kg, RM398++ will be used as the minimal shipping charge!