The following three call options on gold, all expiring in three months, sell for:
Exercise price Option price
$1200 $62
$1250 $40
$1300 $23
Consider the following position:
buy 1 call with K = 1200
sell (write) 2calls with K = 1250
buy 1 call with K = 1300
What would be the values at expiration of such a spread for various prices of spot gold?