Est. Extended Cost & Est. Gross Profit Fields in Opportunity Auto Calculates and Renders Negative Values

Scenario:

User noticed an existing Opportunity record has the following details: 

- Est. Extended Cost column indicates -7,247.63
- Est. Gross Profit column indicates -302.7213%

Recommendation:

With the scenario of the Opportunity record, the Projected Total was originally 13,017.30, this was manually altered to a lower amount of 2,317.60.

When reverted to 13,017.30, the correct numbers display:
- Est. Extended Cost = 3,452.07
- Est. Gross Profit = 26.5191%