The answer is: Â "Â $Â 130.00Â "Â ; Â or, write as: Â "Â $ 130Â " .
Explanation:
        →   { $ 58.23  +  $ 66.57 } ;
 →   Round EACH of these TWO (2) values to the nearest TEN (10) dollars ;
  {as per the instructions specified in THIS VERY "" question/ problem} ;Â
 →  Start with the first 'given value' :   →  " $ 58.23 "  ;Â
→  We are instructed to round to the nearest TEN (10) dollars ;Â
→  Do we round to:  "$ 50.00" ? ; or, to:  "$ 60.00" ?
→  Since the amount is:  " $ 58.23 " ;Â
→ We look the value of the "digit" that appears in the "space" DIRECTLY AFTER the:               " ($5) " . Â
         →  If the [said digit] is:  "5 or greater" {i.e., "5, 6, 7, 8, or 9"} ;          Â
                         then we round (up) to:  " $ 60.00 " .                             Â
         →  If the [said digit] is:  "4 or lesser" {i.e., "4, 3, 2, 1, or 0") ;Â
                         then we round (down) to:  " $ 50.00 " .
→ Since the [said digit] in the value, " $ 58.23" ; is:  "8" ;       Â
→ { and since:  "8" — is a [number/digit) that is:  "5 or greater" } ;Â
→ We round (up) to: " $60.00 " .
→  Now, let us consider the "second value" given to us:  →  " $ 66.57 " ;
→  We are instructed to round to the nearest TEN (10) dollars ;Â
→  Do we round to:  " $ 60.00" ? ;  or,  to:  " $ 70.00"  ?
→  Since the amount is:  " $ 66.57 " ;Â
→ We look the value of the "digit" that appears in the "space" DIRECTLY AFTER the:               " ($6) " ;
           →  If the [said digit] is:  "5 or greater" {i.e., "5, 6, 7, 8, or 9"} ;           Â
                         then we round (up) to:  " $70.00 " .                             Â
          →  If the [said digit] is:  "4 or lesser" {i.e., "4, 3, 2, 1, or 0") ; Â
                         then we round (down) to:  " $60.00 " .
                            Â
.→ Since the [said digit] in the value, " $ 66.57 " ; is:  "6" ;       Â
 →  { and since:  "6" — is a [number/digit) that is:  "5 or greater" } ;Â
 → We round (up) to: " $70.00 " .
.
 →  So;  as per the instructions in this very "" question/problem ;Â
We rewrite:  →  { $ 58.23  +  $ 66.57 } ;
  →  by substituting:  "$60.00" (in lieu of:  "$58.22") ;  and
  →  by substituting:  "$70.00" (in lieu of:  "$66.67") ; Â
  →  as follows:
   →  { $60.00  +  $70.00 } ;
    → and add these 2 (TWO) "rounded" values together; as follows:
    →  { $ 60.00  +  $ 70.00 } ;  to get: Â
    =  " $ 130.00 " ; or, write as:  " $ 130 " .
 Â