Goes to the silver merchant.
"I tell you what. Give me and my crew a flat rate of 760 gold and we are will accompany your silver delivery safely. You keep all four wheels on the wagon and your driver keeps his heads from a decorating goblin's pike-staff.
It seems the Lady values dead goblins more than live guards. You must be moving several hundred tons of raw ore. Even refined ore of the top grades is still only a handful of mineral ounces per ton. Ain't no one risking his ass attacking your freight for lumps of rock worth a 2gp piece a ton.
Now, if you are moving cast ingots, then that is another matter. A 6" x 3", 20lb bar might be worth 100gp. So let me do some orcish maths. A 400lb wagon drawn by two draft horses each pulling five times their carry capacity, minus the wagon leaves you 4,000lbs of weight. So minus a few incidentals and the driver, say 200lbs means you have 190 ingots, give or take, leaving here along the risky, bandit ridden trade routes at dawn tomorrow. So I reckon, give or take, your cargo is worth $19,000gp.
We sell our bodies for less than 4% of the shipment value. So what do you think? I can ask my esteemed comrade, the Fist of Mitra to come and sign a contract of employment and you get the best, meanest, cutthroats this side of Arden Vul."