你那会（儿？）做了两三份就（费）了好大劲的. It was great effort that you spent to make several merely at that time.

“废了好大劲” 表示‘’花费了很多时间和精力，克服了很多困难”

这句是-你怎么只做了两三份就费了好大劲呢，意思是你做的并不多，怎么那么难做呢？this job is not dificult,why have you cost so much energy?