The after-school craft center has 15 boxes of 64 crayons each. in 12 of the boxes 28 of the crayons have not been used. all the rest have been used. how many of the crayons in the center have been used?

Grace is a 70-year old woman who paid the utility bill online for the first time. she called her bank's customer service center to make sure she had done the transaction successfully. but the voice recording repeatedly played a message that all representatives were busy, which irked grace. which factor would make grace not recommend the bank to others? a. absence of technology b. lack of accessibility c. lack of financial products d. poor reputation