Question 938270
(1):


All 90 seats.
v, VIP seats
r, regular seats
{{{r+v=90}}},
{{{r=90-v}}}
-
{{{35*50+(90-35)*30}}}, the revenue.



3400



(2):

Attention goes to the amount of cocoa.
{{{4*(50/100)+6(80/100)}}}
{{{4(1/2)+6(4/5)}}}
{{{2+24/5}}}
{{{2+4&4/5}}}
{{{6&4/5}}} ounces cocoa