It appears that there may have been some confusion between your quotations ER889 and ER887 and that the quantities of the former may have been inadvertently entered in the latter. We would be grateful if you could check this and inform us if an error appears to have arisen
They want us to let them know if there is an error in our ...
a. quotation ER889
b. quotation ER887
c. quotations ER889 and 887