Problem-Adding Numeric Values In The Database

i have a table in the below shown format

Values Items.......................................................TABLE1

Customer1 20 Fuses

Customer2 30 Screws

Customer3 40 Fuses

Customer1 45 Fuses

Customer3 78 Batteries

Customer1 40 Screws

now i want to add the values of screw of customer1 and insert in a table in one field as shown below

Screws Fuses Screws .................................TABLE2

Customer1 65 (total of above) 115 40

Custoerm2 ------------------------------------

NOW ADD VALUES IN THE ABOVE WAY AND INSERT IN THE TABLE 2


Thanks


Navi