Ann: OceanaGold Full Year 2019 Results Presentation, page-8

Lets clarify this option strategy.
The put option and the call option strategy are two totally separate strategies.
The put option strategy is a simple act of buying puts at a strike price which means that if the price of gold goes below the strike price of $2,000 NZ then the company begins to make money and can hedge its production costs with the amount of puts it has bought. This is a hedge.
Now the call option strategy is quite simply a one way bet that the NZ gold price will remain below $2100 The option expires in December this year. So OGC is exposed to pay anything above $2100 to the option buyer until expiry
OGC has essentially capped the price of gold it can receive to the tune of $2100 NZ on these options which is probably numbers 59,400
The current gold price in NZ dollars is $2551