Question 1062332
Most interest in solving is knowing or finding the area.  The money unit conversion will be simple.


Look at the triangle:  450 yards and 320 yards, with 80 degrees between these two sides.  Use the 450 yard side as base.  You want the altitude, which can be {{{320*sin(80)}}}.


AREA is  {{{(1/2)450*320*sin(80)}}}
more simply, area is  {{{72000*sin(80)}}}.  Square Yards.


Now, take care of the cost.