What engine?
My 147 1.6 cost about £250 for clutch kit, £30-odd for slave cylinder, and someone charged me £200 to fit it - which ai think he regretted, my mate's garage wanted £700 according to autodata it's an engine and gearbox out job.
If a diesel, you probably don't need to worry about the slave cylinder, but additional costs for a dual mass flywheel will likely apply.