Contracting The Execution Of The Work: "Improvement Of The Educational Service Of The Primary Level Of The Educational Institution No. 89549 Of The Town Of Mashinca Of The District Of Chacas - Province Of Asuncion - Department Of Ancash" - Stage I, C - Contracting Of The Execution Of The Work: "Improvement Of The Educational Service Of The Primary Level Of The Educational Institution No. 89549 Of The Town Of Mashinca Chacas - Asuncion Province - Ancash Department " - Stage I, With Single Investment Code No. 2505394