The question you asked doesn't make much sense. 1+2 means 1 coffee for two partners. If both partners are sugar, it will not exceed 10g, and the maximum calorie of 10g sugar will not exceed 40 calories. Baidu knows the following data for reference only.

Sugar 100G contains 400 calories;

Soft candy 100G contains 396 calories;

Rock sugar 100G contains 397 calories;

Tang Hong 100G contains 389 calories;

Maltose 100G contains 33 1 calorie;

Honey 100G contains 32 1 calorie;

Glucose 100G contains 400 calories;

Xylitol 100G contains 240 calories;