This field displays the invoiced amount for the job on this Sales Invoice. The amount here will be the total of all line items on the Apply to Sales Order tab and the Apply to Sales tab for this particular Job ID.
To have an amount appear here, you must have invoiced amounts for a job that are greater than 0.00 and you must specify a Job ID on the associated line items.
If you change any value associated with this job, the amount in this field will automatically be recalculated.