Forms Data Controls :: Insert Multiple Records With Validation?

Name
Product
section of job
Quantity
Max Quantity
A
ABC
offset print
100
1000
B
ABC
water base
200
1000
C
ABC
offset print
950
1000

How to insert multiple records like above at once, and how to manage quantity user input is not over max quantity. In example above: Max quantity of Offset printing is 1000 (bind from database, visible=false)

Woker A does Offset printing with quantity 100, C does Offset printing also but with quantity 950, if we sum quantity A and C do will be over 1000 Ã message box: warning