Chicken Problem

function thing(chickens,l,h)
    return (35-chickens*h)/(l-h)
end
math.randomseed(os.time())
bestErr = math.huge
for i = 1, 100000000 do
    priceBefore = math.ceil(math.random()*100*100)/100
    priceAfter = math.ceil(math.random()*priceBefore*100)/100
    a1 = thing(10,priceBefore,priceAfter)
    a2 = thing(16,priceBefore,priceAfter)
    a3 = thing(26,priceBefore,priceAfter)
    err = math.abs(a1-math.floor(a1))+math.abs(a2-math.floor(a2))+math.abs(a3-math.floor(a3))
    if err < bestErr and (a1>=0) and ((10-a1)>=0) and (a2>=0) and ((16-a2)>=0) and (a3>=0) and ((26-a3)>=0) then
        bestErr = err
        bestPriceBefore = priceBefore
        bestPriceAfter = priceAfter
    end
end
print(bestPriceBefore, bestPriceAfter)