1....hevee werker kost 125$/dae
2...lite werker kost 99$/dae
3...31 werkers kost 4542$
let x=how many hevee, then 125*x +99*(31-x)=4542$
125x -99x+99*31=4542
26x+3069=4542
26x=4542-3069....=1473
x=1473/26=56.65384615
must be sumthun rong tu hav 56.65 werkers
31-x=-25.65.....rong
########## yer numbers no good ...4542$/31 werkers=average pae=146.516$ per werker
but yer most spensiv werker=125$/dae