MPCALC gives you ability to use the on-line calculator  https://mpcalc.mpanel.com  and create access to it for your workers and partners

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login:
password:
preload
password:
password encrypted
preload
password:
password encrypted
preload
password:
password encrypted
preload
password:
password encrypted
preload
password:
773321
preload
password:
354677
preload
password:
553390
preload