I need to send data from table (For example: from row1 the sum of the all values, from row2 the sum of the all values etc) to web merge url.

Url is:  https://www.webmerge.me/merge/54626/7irksc

Test data: ?&initial_users=My_sum_values_from_row1&growth_rate=My_sum_values_from_row2&arpu=My_sum_values_from_row3

But i really don't understand, how i can do this.

So what i want to create [button], after clicking on this downloaded webmerge file from my data 

Thanks!