Estimated Cost Difference in Opportunity/Quote and Part Advisor

As highlighted below, for a particular part and the job associated with it,

In Part Advisor, the Estimated Total cost had come to $84,
However, in Opportunity/Quote, the Total Price comes to $128,

Can any one help understand why difference between the 2
Estimated Total Cost from Part Advisor and
Total Price from Opportunity/Quote is quite significant.

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