COST INCURRED IN "PURCHASES" BY THE BASQUE HEALTH SERVICE - OSAKIDETZA TO FACE THE PANDEMIC. SPECIFICALLY, THE EXPENSES INCURRED IN PERSONAL PROTECTIVE EQUIPMENT TO PROTECT HEALTH PERSONNEL IN THE EXERCISE OF THEIR FUNCTIONS, AVOID CONTAGION AND THAT OF THE POPULATION: MAINLY MASKS (SURGICAL IIR, FFP2, FFP3 ...), INCLUDING SCREENS, GLASSES OR OTHER CATEGORIES OF PPE ...