var buy_u=1.00;
var buy_z=7.92;
var buy_e=10.50;
var buy_r=26.00;
var buy_ya=buy_r+20;
var buy_zp=buy_r+0.50;

var sel_u=1.00;
var sel_z=7.8;
var sel_e=9.20;
var sel_r=buy_r-2.00;
var sell_ya=0;
var sell_zp=buy_zp-2.50;