Laminate flooring cost depends on a few factors:
Lamiante flooring price.
Lamiante flooring installation cost.
Accessories cost, for example: metal trims, quads, skirting boards removal and installation, underlay.
Cost of subfloor leveling which depends on how bad is the condition.
Delivery cost as sometimes the suppliers do not include this cost in their advertised price.
Cost of existing floor removal and disposal.