solution: divide the available items on hand with the items needed in each bag.
105 bags / 1 = 105 gift bags maximum can be given
150 pens / 2 = 75 gift bags maximum can be given ANSWER
115 notebooks / 1 = 115 gift bags maximum can be given
330 pencils / 3 = 110 gift bags maximum can be given
190 highlighters / 2 = 95 gift bags maximum can be given
From what we did above, we are only allowed to give 75 gift bags since beyond this number, no more pens are available.