How much can I call here?

[HEK]

What's the standard max I can call here to chop?

Party Poker No-Limit Hold'em, $20 BB (5 handed) converter

saw flop|<font color="#C00000">saw showdown</font>

<font color="#C00000">Hero ($3147.20)</font>
<font color="#C00000">SB ($1958.44)</font>
BB ($4376.90)
UTG ($2009.76)
MP ($6078.37)

Preflop: Hero is Button with 3[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $60</font>, Hero calls $60, SB calls $50, <font color="#666666">1 fold</font>.

Flop: ($200) 6[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, MP checks, <font color="#CC3333">Hero bets $150</font>, SB calls $150, MP folds.

Turn: ($500) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

River: ($500) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>