Seach around word text - display totals only!

An input data file looks like this: (see below) 

Description:  financial amount
Shoes:         $110
Car:              $3,100
Rates:          $0,50

I want to add the total of amount.
Also want to add all the totals containing an "s" discription.

My problem is basically 
Searching arround the word text to display the total only.

Certainly I know how to go about adding  the totals.

• Seach around word text - display totals only! by Bruce Ambraal
• RE: Seach around word text - display totals only! by Timothy Johnson
• Re: Seach around word text - display totals only! by Jeff 'japhy' Pinyan