<PRE><B>Question 199722</B>
Let  v = # VIP Rings  ,,,,and  s = # SST  Rings
,
(1) 3 v + 2 s = 60 hrs
.
(2) v + s = 24,,,,,or  v = 24 -s 
.
subst  in  (1),,,, 3(24-s) +2 s = 60
.
72 -3s +2s =60
.
12 = s
.
v = 24-s=24-12=12,,,,which  is  answer  (C)
.
Profit  from  12 each  is  12(40) + 12 (35) = $ 900,  made  within  guidelines
.
Checking  the  other  options
.
A)  14(40) +10(35) =$ 910  BUT
checking  hrs, 14(3) + 10(2) = 62 hrs,,,,over  limit  of  60
.
B) 12(40) + 8(35) = $ 760,,,,,  low
with  hrs  of  12(3) +8(2) =  52,,,  also  low</PRE>