HT Enterprises Frontier Tip-Up

HT Enterprise Lady Pink LIP-200 Polar Tip-Up : Fishing Ice Fishing Tip Ups : Sports & Outdoors

I don't understand how one gets the sd and return from the equation above (slope of efficient frontier=slope of cml) Aren't those two unknown variables? How do I get both with only

HT Enterprises Frontier Tip-Up

HT Enterprises Polar Thermal Extreme Ice Tip-Up

Ice Fishing Tip-Ups, Ice Fishing Tilts & Lines

Ice Fishing Gear & Accessories, Best Brands in Ice Fishing

HT Enterprises Polar Therm Tip-Up

HT Enterprise Polar Tip-Up with 200 Yard Spool : Fishing Ice Fishing Tip Ups : Sports & Outdoors

Las mejores ofertas en Equipo de Pesca HT Enterprises

HT Enterprises FRT-1 Frontier Tip-up

HT Enterprises Frontier Tip-Up

Ht Enterprise Inc Tip Up Spare Spools, The Fishin' Hole

Las mejores ofertas en Equipo de Pesca HT Enterprises