Create Calculation Expression in Access 2000

Hi. I have a legacy FrontPage 2000 website that uses an Access 2000 database (Access2000test.mdb)

see information in Shared One-Drive:
https://1drv.ms/u/s!AkVNIj06hxI7gRjXjIxAS0bPBt6b

1- In table1, I have created two fields where I would like to calculate the following as each record is created

[TradePriceTotal} I would like this to calculate the total sum of the field [TradePrice] for all records

[TradePriceAvg] I would like this field to calculate the avg of [TradePrice] for all records