MENSA #1 Mystery Cache

First of all, Mensa is not an acronym.  It is the Latin word meaning "table" and it indicates that all members are equal. Race, colour, creed, national origin, age, politics, educational or social background are irrelevant.  (Remember King Arthur's Round Table?) 

Using all the digits from 1-9, you can construct many different additions (for example, 317 + 628 = 945). There are four such examples below which have a total 468.  Find the missing numbers. You may not simply reverse the top and bottom numbers; new combinations must be found.

The cache can be found at:-

N53 B8.J04 W002 OQ.4RA  

You can check your answers for this puzzle on GeoChecker.com.

** Note the coordinates were moved on 2/2/21 **