Micropolis - prices tweak; didn't work

EDITED THE PRICES IN THE FILE res/micropolis.tcl

set ToolInfo {
{ {a} {Residential Zone} {$100}}
{ {a} {Commercial Zone} {$300}}
{ {an} {Industrial Zone} {$300}}
{ {a} {Fire Station} {$500}}
{ {a} {Query} {free}}
{ {a} {Police Station} {$500}}
{ {a} {Wire} {$5}}
{ {a} {Bulldozer} {$1}}
{ {a} {Rail} {$20}}
{ {a} {Road} {$10}}
{ {a} {Chalk} {free}}
{ {an} {Eraser} {free}}
{ {a} {Stadium} {$5,000}}
{ {a} {Park} {$20}}
{ {a} {Seaport} {$3,000}}
{ {a} {Coal Power Plant} {$500}}
{ {a} {Nuclear Power Plant} {$2,000}}
{ {an} {Airport} {$10,000}}
{ {a} {Network} {$1,000}}
}

HAD NO EFFECT ON THE GAME - CHANGED THE PRICES AS THEY ARE DISPLAYED IN THE PALLETE DISPLAY, BUT THE COSTS STAYED THE SAME