The net buoyancy force (in Newton) acting on the core of an Aluminium alloy casting

Question

An aluminium all0y (density 2600 kg/m³) casting is to be produced. A cylindrical hole of 100 mm diameter and 100 mm length is made in the casting using sand core (density 1600 kg/m³). The net buoyancy force (in Newton) acting on the core is ________