If the calculated in 0.1USD, asking him to make sure that we put the loss of 0.13*90000=11700USD within the next 6 months back, otherwise we cannot accept the 0.1USD.
If the calculations to 0.1USD, please make sure that we can lose him down in the next 6 months 0.13 * 90000 = 11700USD make it up, otherwise we have no way to accept 0.1USD.
If the 0.1USD calculation, we asked him to ensure that in the next 6 months will be the loss of the 0.13*90000 = 11700USD back down, otherwise we have no way to accept 0.1USD.