All Together, Batch, One Lump
noun, verbal noun, の adjective
Fasten everything into one. All together in one batch or lump.
いっかつ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own. Watch out for the shortened いち.
日本では焼き菓子作りとか料理の計量方法が違うんだよね。いっそ世界中の計量方法が一括で同じだったらいいのにね。
In Japan they use a different method of measurement for baking sweets and cooking. I think it would be better to have one way of measuring throughout the world.